Percent practice

Percentage is a way of expressing a number, especially a ratio, as a fraction of 100. See also our verbal problems in percent or
examples1, examples2, examples3, examples4, examples5.

Calculate:

The number of examples:
Range of values:
Complexity:

80%	of	75	=
40%	of	75	=
60%	of	80	=
50%	of	28	=
50%	of	48	=
70%	of	40	=
80%	of	15	=
20%	of	100	=
20%	of	20	=
40%	of	60	=

Percentage in word math problems

• Dimensions of a fabric
  How many m² of fabric is needed to make a tent of a regular 3-sided prism if it is necessary to count on a 2% reserve of fabric? Dimensions - 2 m 1.6 m and height 1.4 m
• Ski course
  From 96 children who participated in the ski course were 21 excellent skiers, 30 good and 13 average and the rest were beginners. Calculate this data in percentages.
• Clock
  How many times a day do hands on a clock overlap?
• Simple interest
  Peter put into bank 853 euros deposit. After 7 years on account, overall was 984 euro. What was the interest rate if the bank added simple interest?
• 100 %
  How much is 100% if 82 % is 77?
• Fertilizer
  Mr. Gherkin uses for fertilization 7% solution of fertilizer. 9 liters of it still left. How much water must be added to the solution to make only the 4% solution?
• Veal weight
  The weight of the veal obtained is 64% of the total weight of live calves. What was the weight of the live calves, from which 16,830 kg of veal were obtained?
• Mesh usage
  We use 540 m of mesh, of which 20% are for connecting corners. How much mesh did we use to join the corners?
• Shots
  Determine the percentage rate of keeper interventions if 32 shots don't catch four shots.
• Three shapes
  1/5 of a circle is shaded. The area's ratio of a square and the sum of a| rectangle and the circle is 1:2. 60% of the square is shaded, and 1/3 of the rectangle is shaded. What is the ratio of the area of the circle to that of the rectangle?
• Peroxide
  How many ml of 30% hydrogen peroxide (H2O2) should we add to 100 ml of water (H2O) to obtain a 20% solution?
• Substance solution
  During spraying, there are 4 per mille of active substance per 6 l of water. How many ml of active substance do we add to the spray?
• Prime number
  Jan wrote any number from 1 to 20. What is the probability that he wrote the prime number?
• Cake discount percentage
  The store sells 3 types of cakes: poppy, cottage cheese, and jam. They all cost the same. As of yesterday, the following offer applies: If you buy any 8 of these cakes, you will pay for only 5. How much percent less will I pay now for 8 of these cakes?
• Pyramid Tent Canvas Area
  The pyramid-shaped tent has a square base with a side size of 2.2 m and a height of 1.8 m. How many square meters of tent canvas are needed to make it if we count an extra five percent for the foundation?

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