Percentages - practice for 13 year olds - page 21 of 55
Number of problems found: 1099
- Wholesale vs retail
For books, retail adds 10% of the wholesale price of the goods. If the book costs 4.80 euros wholesale, how much will it cost in retail? - Solution 38451
Prepare 2 liters (kg) of a 3% salt solution in water. - Solution 38411
Prepare 250g of a 30% solution of hydrogen peroxide in water. - Salicylic 38401
Prepare 600 g of an 8% solution of salicylic acid.
- Difference 38253
The blue coat, which costs CZK 1,200, has a price 40% lower than the red coat. What is the price difference between the two coats? - Lions
If eight lions are 40%, how many would 75% be? - Percentage 37941
What percentage is 119 t of 85 t? - Increases 37921
Increases number of 250 by 11% - What 37901
What is more, 14% of 27 or 15% of 28?
- Cardboard 37871
The closed cardboard box has the shape of a block measuring 25 cm, 1.2 dm, and 0.5m. How much cardboard is needed to make 20 such boxes? If you need to add 5% per bend. - Bronze 37391
Bronze is an alloy of tin and copper. Copper is 85% the rest is tin. How much bronze do we make from 51 kg of copper? Will 8 kg of tin be enough for us? - Three-quarters 37241
We have two cube-shaped tanks. The first has an edge of 12 dm long, and the second has an edge of 20% longer. By what % more or less water is there in the second tank if the first is three-quarters full and the second three-eighths full? - The notebook
After rising by 40%, the notebook cost 10.50 euros. How much did this notebook cost if it increased in price by only 20% instead of 40%? - Percentage 37021
What percentage of vinegar do we get by mixing 2 liters of 8% vinegar with 3 liters of 4% vinegar?
- Determine 36931
After a 6% discount, the family paid CZK 9,400 for the TV. Determine the price of the TV before the discount. - Difference 36821
What is the difference between ¾ of 50% of 100 and ½ of 75% of 100? - Original price
Find the original price of a car if it was firstly increased by 4% and then reduced by 2%. It now costs CZK 326,144. - Wrapping 36303
How much will we pay for wrapping 5 boxes in the shape of a cube with a side length of 80 cm if we count on a margin of 35% for folds? The price for 1 square meter of paper is €2.55. You can only buy whole square meters. - Iglu - cone tent
The cone-shaped tent is 3 m high, and the diameter of its base is 3.2 m. a) The tent is made of two layers of material. How many m² of fabric is needed for production (including flooring) if 20% needs to be added to the minimum amount due to cutting waste
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