Find a percentage of a number

{"questions":[{"content":"A store received $100\\space kg$ of apples and sold $20 \\%$ of them on the first day. How many $kg$ of apples were sold that day?[[image-1]][[fill_choice_big-511]]","widgets":{"image-1":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/10/obrazavr_frukty_yabloko.svg","width":"300"},"fill_choice_big-511":{"type":"fill_choice_big","options":["$20\\space kg$","$25\\space kg$","$50\\space kg$"],"placeholder":0,"answer":0}}},{"content":"The box contained $500$ gel pens. Of these, $5 \\%$ were green pens. How many green pens were in the box?[[image-4]][[fill_choice_big-542]]","widgets":{"image-4":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/05/ruchka.svg","width":"299"},"fill_choice_big-542":{"type":"fill_choice_big","options":["$25$","$5$","$50$"],"placeholder":0,"answer":0}}},{"content":"A travel route is $600\\space km.$ long. How many kilometres have the travellers covered after completing<br />$10\\%$ of the route?[[image-9]][[fill_choice_big-593]]","widgets":{"image-9":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/11/turist-ryukzak-shlyapa-tsvetokelki-les.svg","width":"300"},"fill_choice_big-593":{"type":"fill_choice_big","options":["$60 \\space km$","$100\\space km$","$10\\space km$"],"placeholder":0,"answer":0}}},{"content":"A barrel held $700\\space L$ of water. $50 \\%$ of the water was used to water the garden. How many litres were used?[[image-16]][[fill_choice_big-634]]","widgets":{"image-16":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/08/polivaet-rastenie-1.svg","width":"299"},"fill_choice_big-634":{"type":"fill_choice_big","options":["$350\\space L$","$200\\space L$","$500\\space L$"],"placeholder":0,"answer":0}}},{"content":"During the day, $2500\\space kg$ plums were collected in the garden, of which $10 \\%$ were sent to kindergartens. Find the mass of plums sent to kindergartens.[[image-100]][[fill_choice_big-675]]","widgets":{"image-100":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/10/obrazavr_frukty_sliva.svg","width":"299"},"fill_choice_big-675":{"type":"fill_choice_big","options":["$250\\space kg$","$1000\\space kg$","$500\\space kg$"],"placeholder":0,"answer":0}}},{"content":"In winter, a goat and a cow need $20\\space kg$ of hay per day altogether. The goat eats $20 \\%$ of this hay. How many kilograms does the goat eat?[[image-81]][[fill_choice_big-716]]","widgets":{"image-81":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/12/goat-1.svg","width":"298"},"fill_choice_big-716":{"type":"fill_choice_big","options":["$4\\space kg$","$5\\space kg$","$12\\space kg$"],"placeholder":0,"answer":0}}},{"content":"$800$ thousand rubles were spent on house renovation. $40 \\%$ of this amount was spent on paying workers. How much money was spent on paying workers?[[image-64]][[fill_choice_big-757]]","widgets":{"image-64":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/10/rialiti-shou-01.svg","width":"300"},"fill_choice_big-757":{"type":"fill_choice_big","options":["$320$ thousand rubles","$400$ thousand rubles","$550$ thousand rubles"],"placeholder":0,"answer":0}}},{"content":"Strawberries contain an average of $6 \\%$ sugar. How many kilograms of sugar are in $50\\space kg$ strawberries?[[image-49]][[fill_choice_big-798]]","widgets":{"image-49":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/10/obrazavr_yagody_klubnika.svg","width":"299"},"fill_choice_big-798":{"type":"fill_choice_big","options":["$3\\space kg$","$6\\space kg$","$12\\space kg$"],"placeholder":0,"answer":0}}},{"content":"A kitten's mass is $10 \\%$ of its mother's mass. Find the kitten's mass if its mother's mass is $1500\\space g.$[[image-36]][[fill_choice_big-839]]","widgets":{"image-36":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/05/koty-koshki-kot-koshka-spyat-spit-.svg","width":"300"},"fill_choice_big-839":{"type":"fill_choice_big","options":["$150\\space g$","$350\\space g$","$400\\space g$"],"placeholder":0,"answer":0}}},{"content":"How many grams of fat are in $100\\space g$ of milk with a fat content of $2.5 \\%$?[[image-25]][[fill_choice_big-880]]","widgets":{"image-25":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/05/carton-1-1.svg","width":"300"},"fill_choice_big-880":{"type":"fill_choice_big","options":["$2.5 \\space g$","$25 \\space g$","$5 \\space g$"],"placeholder":0,"answer":0}}}]}

{"questions":[{"content":"A swimming pool is $65\\%$ full. Find the volume of water in the pool if its capacity is $1000\\space L.$ [[image-1]][[fill_choice_big-511]]","widgets":{"image-1":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/03/bassejn-plyvet-plovecz-plavaet-1-1.svg","width":"300"},"fill_choice_big-511":{"type":"fill_choice_big","options":["$650\\space L$","$800\\space L$","$500\\space L$"],"placeholder":0,"answer":0}}},{"content":"A cyclist travels at $500\\%$ of a pedestrian's speed. Find the cyclist's speed if the pedestrian's speed is $5\\space km/h.$[[image-4]][[fill_choice_big-542]]","widgets":{"image-4":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/03/na-velike-velosiped-01-2-3.svg","width":"299"},"fill_choice_big-542":{"type":"fill_choice_big","options":["$25\\space km/h$","$50\\space km/h$","$20\\space km/h$"],"placeholder":0,"answer":0}}},{"content":"$25\\%$ of a vegetable garden was dug in one day. Find the area that was dug if the garden's total area is $100\\space m^2.$[[image-9]][[fill_choice_big-593]]","widgets":{"image-9":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/06/kopaet-kartoshku.svg","width":"299"},"fill_choice_big-593":{"type":"fill_choice_big","options":["$25\\space m^2$","$50\\space m^2$","$30\\space m^2$"],"placeholder":0,"answer":0}}},{"content":"A mine's monthly coal production target is $800\\space t.$ In one week, it produced $45\\%$ of this target. How much coal was mined that week?[[image-16]][[fill_choice_big-634]]","widgets":{"image-16":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/03/6-1.svg","width":"297"},"fill_choice_big-634":{"type":"fill_choice_big","options":["$360\\space t$","$400\\space t$","$510\\space t$"],"placeholder":0,"answer":0}}},{"content":"The mass of the cat is $3\\space kg,$ and the mass of the dog is $1000\\%$ of the mass of the cat. Find the mass of the dog.[[image-100]][[fill_choice_big-675]]","widgets":{"image-100":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/09/domashnie-zhivotnye.svg","width":"298"},"fill_choice_big-675":{"type":"fill_choice_big","options":["$30\\space kg$","$20\\space kg$","$15\\space kg$"],"placeholder":0,"answer":0}}},{"content":"Bread costs $50\\space \\text{rubles},$ and the cost of a watermelon is $200\\%$ of the cost of bread. Find the cost of a watermelon.[[image-81]][[fill_choice_big-716]]","widgets":{"image-81":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/08/arbuz-01-3.svg","width":"297"},"fill_choice_big-716":{"type":"fill_choice_big","options":["$100\\space \\text{rubles}$","$300\\space \\text{rubles}$","$200\\space \\text{rubles}$"],"placeholder":0,"answer":0}}},{"content":"A group has $60$ people, of whom $75\\%$ are women. How many women are in the group?[[image-64]][[fill_choice_big-757]]","widgets":{"image-64":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/10/crowded-1.svg","width":"300"},"fill_choice_big-757":{"type":"fill_choice_big","options":["$45$","$50$","$70$"],"placeholder":0,"answer":0}}},{"content":"The base of a triangle is $150\\%$ of one of its other sides. Find the base if that side is $8 \\space cm.$[[image-25]][[fill_choice_big-880]]","widgets":{"image-25":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/08/obrazavr-s-uglom-krivye.svg","width":"300"},"fill_choice_big-880":{"type":"fill_choice_big","options":["$12 \\space cm$","$10 \\space cm$","$6 \\space cm$"],"placeholder":0,"answer":0}}},{"content":"A tortoise moves at $2\\%$ of a hare's speed. Find the tortoise's speed if the hare's speed is $50\\space km/ h.$[[fill_choice_big-81]][[image-146]]","widgets":{"fill_choice_big-81":{"type":"fill_choice_big","options":["$1\\space km/ h$","$2\\space km/ h$","$2.5\\space km/ h$"],"placeholder":0,"answer":0},"image-146":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/06/page-1.svg","width":"300"}}},{"content":"There are two roads leading into the city. The length of the first road is $200\\space km,$ and the length of the second is $60\\%$ of the length of the first. Find the length of the second road.[[fill_choice_big-181]][[image-250]]","widgets":{"fill_choice_big-181":{"type":"fill_choice_big","options":["$120\\space km$","$150\\space km$","$100\\space km$"],"placeholder":0,"answer":0},"image-250":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/03/mashina.svg","width":"300"}}}]}

{"questions":[{"content":"The bank pays $8 \\%$ interest per year. A customer deposits $50\\space 000\\space \\text{rubles}.$ How much interest will the bank pay the customer after one year? [[image-1]][[fill_choice_big-511]]","widgets":{"image-1":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/12/bank.svg","width":"300"},"fill_choice_big-511":{"type":"fill_choice_big","options":["$4\\space000\\space \\text{rubles}$","$8\\space000\\space \\text{rubles}$","$5\\space000\\space \\text{rubles}$"],"placeholder":0,"answer":0}}},{"content":"The refrigerator cost $30\\space 000\\space \\text{rubles}.$ In May, the price of the refrigerator was increased by $20 \\%.$ How much did the cost of the refrigerator increase in May? [[image-4]][[fill_choice_big-542]]","widgets":{"image-4":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/03/fridge.svg","width":"299"},"fill_choice_big-542":{"type":"fill_choice_big","options":["$6\\space000\\space\\text{rubles}$","$2\\space000\\space\\text{rubles}$","$8\\space000\\space\\text{rubles}$"],"placeholder":0,"answer":0}}},{"content":"A car used $15\\space L$ of fuel per $100 \\space km.$ After its engine was adjusted, its fuel consumption fell by $10 \\%.$ By how many litres did its fuel consumption decrease?[[image-9]][[fill_choice_big-593]]","widgets":{"image-9":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/09/bezhit-beg-sport-01-2.svg","width":"300"},"fill_choice_big-593":{"type":"fill_choice_big","options":["To $1.5 \\space L$","To $10 \\space L$","To $2 \\space L$"],"placeholder":0,"answer":0}}},{"content":"There were $1200$ phones in the online store. In two months, $15\\%$ of all phones were sold. How many phones were sold?[[image-16]][[fill_choice_big-634]]","widgets":{"image-16":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/10/gadzhety-Recovered-01-1.svg","width":"299"},"fill_choice_big-634":{"type":"fill_choice_big","options":["$180$","$150$","$300$"],"placeholder":0,"answer":0}}},{"content":"The mass of the goose is $10\\space kg,$ and the mass of the duck is $75\\%$ of the mass of the goose. Find the mass of the duck.[[image-100]][[fill_choice_big-675]]","widgets":{"image-100":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/12/duck.svg","width":"299"},"fill_choice_big-675":{"type":"fill_choice_big","options":["$7.5\\space kg$","$7\\space kg$","$6\\space kg$"],"placeholder":0,"answer":0}}},{"content":"The book costs $500\\space \\text{rubles},$ and the cost of the album is $30\\%$ of the cost of the book. Find the cost of the album.[[image-81]][[fill_choice_big-716]]","widgets":{"image-81":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/07/hudozhnik-1-1.svg","width":"298"},"fill_choice_big-716":{"type":"fill_choice_big","options":["$150\\space \\text{rubles}$","$300\\space \\text{rubles}$","$200\\space \\text{rubles}$"],"placeholder":0,"answer":0}}},{"content":"There are $40$ students in a class. $90\\%$ of them did their homework. How many students did their homework?[[image-64]][[fill_choice_big-757]]","widgets":{"image-64":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/11/obrazavr_chalk.svg","width":"300"},"fill_choice_big-757":{"type":"fill_choice_big","options":["$36$","$9$","$29$"],"placeholder":0,"answer":0}}},{"content":"The width of the rectangle is $70\\%$ of its length. Find the width of a rectangle if its length is $10 \\space cm.$[[image-25]][[fill_choice_big-880]]","widgets":{"image-25":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2022/06/obrazavr-v-kruge-kvadrate-01-01.svg","width":"300"},"fill_choice_big-880":{"type":"fill_choice_big","options":["$7 \\space cm$","$8 \\space cm$","$5 \\space cm$"],"placeholder":0,"answer":0}}},{"content":"A car travels at $10\\%$ of an airplane's speed. Find the car's speed if the airplane's speed is $600\\space km/ h.$[[fill_choice_big-81]][[image-146]]","widgets":{"fill_choice_big-81":{"type":"fill_choice_big","options":["$60\\space km/ h.$","$100\\space km/ h.$","$200\\space km/ h.$"],"placeholder":0,"answer":0},"image-146":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/03/samolet-3.svg","width":"300"}}},{"content":"There are two stories in the book. The length of the first story is $120$ pages, and the length of the second is $80\\%$ of the length of the first. How many pages does the second story take?[[fill_choice_big-181]][[image-250]]","widgets":{"fill_choice_big-181":{"type":"fill_choice_big","options":["$96$ pages","$100$ pages","$80$ pages"],"placeholder":0,"answer":0},"image-250":{"type":"image","url":"/wp-content/themes/Main/img/math-port/2023/04/chitaet-knigi-sidit-za-partoj-parta-1.svg","width":"300"}}}]}