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:

50	+	10%	+	90%	=
5	-	60%	-	50%	=
70	+	70%	-	70%	=
25	+	60%	-	90%	=
30	+	40%	-	70%	=
20	+	10%	+	80%	=
55	+	20%	-	70%	=
15	-	80%	+	40%	=
60	-	30%	+	90%	=
60	-	10%	-	70%	=

Percentage in word math problems

• Stamps collection
  Together, Peter and Jan had 52,000 stamps in their collection. To compete with their friend, they must have 56700 stamps. They agreed that Peter would increase his collection by 8 percent and Jan would give 10 percent more than he has. How many stamps did
• Temperature calculus
  Calculate the percentage of temperature stúpla if changed from 3°C to 7°C.
• Slovak broad track
  We used to learn in school that Ukrainian railways have wider tracks than ours because of less stable ground. In reality, the track gauge is a deliberate design choice. Calculate how many millimetres our standard gauge of 1,435 mm differs from the Ukraini
• VAT
  John paid 10 Euros in-store for the purchase. Calculate value-added tax (VAT), which is paid in the purchase, if the VAT rate is 20%.
• Event probability
  The probability of event N in 5 independent experiments is 0.4. What is the probability that the event N occurs in one experiment (chance is the same)?
• 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.
• Bank deposit
  Ms. Jana, after the withdrawal amount of 2,500 euros after a year of saving in the bank. What was her deposit if the interest rate was 2.5% p.a?
• Spherical cap
  From a sphere with radius 26, a spherical cap was cut. Its height is 2. What part of the volume is a spherical cap from the whole sphere?
• Acids
  64% acid is made from the same acid of two different concentrations. The amount of weaker acid to the stronger acid is in the ratio 2:1. What was the concentration of the weaker acid if the stronger had 98% concentration?
• Future of libraries
  You know that thanks to the Internet, electronic communications, and the development of online resources, the number of traditional readers annually declines by 17%. This is the irreversible evolutionary shift from old books from libraries to immediately
• Mushrooms
  Fresh mushrooms contain 94% water and dried 9%. How many kilograms of fresh mushrooms are needed to collect to get 10 kg dried?
• Flowerbed
  On the flowerbed were planted 310 flowers - pansies and crayons during the first week, wilts quarter of pansies and an eighth crayons, which is 20% of all flowers. How many pansies were planted on the flowerbed?
• Double percent
  What is 60% of 30% of 8300?
• Dividing money
  I have CZK 6,155, and I need to divide it as a percentage into two outstanding amounts: CZK 12,000 and CZK 35,000. How much money will I send to each of them? Thank you for your answer.

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