Percentages - practice for 14 year olds - page 29 of 61
Number of problems found: 1210
- Corona again
The population on long island is 7.75 million, and the coronavirus has affected 22,178. What percent of the population is affected? (looking for one case per n people) - Cherries 19903
There are pears, apples, and cherries in the alley. There are a total of 1,075 trees. Pear is twice as much as apple, and cherry is 30% more than apple. How many trees are there? - Water tanks
A different amount of water is poured into the three identical vessels. Water fills 30% of its volume in the first vessel, and in the second vessel, 40% of its volume. The third container contains 19 liters of water. If we distributed the water from all t - Expensive 19583
Zuzka and Katka bought skis. Zuzkyně was 25% more expensive than Katkiny. How much more were Katka's skis cheaper than Zuzka's?
- Accounted 19563
During the fishing of the pond, 19 catfish were caught. They accounted for 4% of all fish caught. How many fish were caught? - Forty-eight 19513
25% of children did not attend the course because they were ill. Forty-eight children passed the course. How many children were initially supposed to complete the course? - Triangular prism
The base of the perpendicular triangular prism is a rectangular triangle with a hypotenuse of 10 cm and one leg of 8 cm. The prism height is 75% of the perimeter of the base. Calculate the volume and surface of the prism. - Solution 19283
How many grams of 80% solution and 55% solution do we need to mix to obtain 100 grams of 60% solution? - Successfully 19213
Of all complaints submitted, 741 were successfully resolved. These represented 95% of all complaints. How many complaints were there?
- Mushrooms 18933
When dried, mushrooms lose 80% of their weight. How many fresh mushrooms do we need to get half a kilogram of dried ones? - Unknown 18893
The number 290 is 16% larger than the unknown number. What's the unknown number? - Percentage 18663
Of the 1,500 light bulbs produced, 21 were defective. What percentage of light bulbs were flawless? - Gardeners 18653
Gardeners planted 16% more currant bushes than initially planned. They planted a total of 145 shrubs. What was the original plan? - Percentage 18513
The machine tool produced 516 pieces instead of the 480 parts originally planned. What percentage did it exceed the plan?
- The surface area
How much percent will the surface area of a 4x5x8 cm block increase if the length of the shortest edge is increased by 2 cm? - Determine 17901
Determine the product's original price, which, after an increase of 20%, costs 90 CZK. - Increased 17773
Salaries increased by 4:3. How much did wages increase? - Concentration 17633
If we mix 4l and 6l of differently concentrated salt solutions, we get a 12% solution. If we use 6l of the first and 4l of the second solution, we get a 13% solution. What is the concentration of each solution? - Percentage 17613
At a horizontal distance of 800 m, the ski slope drops to 220 m above sea level. Determine the percentage decrease.
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