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:

64	-	50%	=
20	+	70%	=
25	-	40%	=
40	+	10%	=
80	-	10%	=
78	+	50%	=
58	-	50%	=
85	-	80%	=
70	-	20%	=
94	+	50%	=

Percentage in word math problems

• Date game
  Let now is Tuesday. What day is after 229 days? Write the result as a number: 1=Monday, 2=Tuesday, 3=Wednesday, 4=Thursday, 5=Friday, 6=Saturday, 7=Sunday.
• Divisibility
  Determine all divisors of a number 91.
• Acids
  70% acid is made from the same acid of two different concentrations. The amount of weaker acid to the stronger acid is in ratio 2:1. What was the concentration of the weaker acid if the stronger had 91% concentration?
• Sugar
  The sugar factory produced 309.2 tons of sugar in 1 day at 14% sugar content. How many tons of pure beet sugar factory processed in 1 day?
• Car value
  The car loses value by 15% every year. Determine a time (in years) when its price will halve.
• Class
  In the 7C class, there are ten girls and 20 boys. Yesterday was missing 20% of girls and 50% of boys. What percentage of students are missing?
• The tent
  The tent shape of a regular quadrilateral pyramid has a base edge length of a = 2 m and a height of v = 1.8 m. If we have to add 7% of the seams, how many m² of cloth did we need to make the tent? How many m³ of air will be in the tent?

• Percents - easy
  How many percent is 432 out of 434?
• Number 3780
  25% of the number x equals 2^-1. What is the value of x?
• Specify 3808
  Specify a number that is 61% less than 10².
• Percentage 3892
  The bar contains 81g of coconut per 200g. What percentage of coconut does the bar have?
• Interest rate
  At what annual interest rate would we get an interest of 60 euros on a deposit of € 6,000 for three months?
• Solution 4284
  How many grams of table salt and water do we weigh to prepare 500 g of a 15% solution?
• Pesos
  What amount increased by 20% will equal P60?
• Ordering 4452
  Mr. Milan bought a new bicycle. The Milan he chose was out of stock, so he had to order it. When ordering, he paid a deposit of 110 euros, which is 40% of the total price. How many euros did Mr. Milan's bike cost?

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