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:

21	-	6%	=
65	-	21%	=
53	+	29%	=
22	+	31%	=
73	-	23%	=
44	-	1%	=
17	+	21%	=
9	+	19%	=
83	-	34%	=
81	+	31%	=

Percentage in word math problems

• Deposit interest calculation
  How much € do we have to save on a three-month term deposit with an interest rate of 2.5% pa? If we want the deposit to earn an interest of € 1,100
• Demographics
  The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase in population?
• Vinegar 2
  If we mix 3.5 liters of 5.8 % vinegar with 5 liters of 7.6 % vinegar, how many percentages of vinegar solution will we get?
• Interest
  Calculate how much you earn for 8 years 17000 deposit if the interest rate is 1.2% and the interest period is a quarter.
• VAT lottery
  Father earns 809 euro a month, mother 480 euro per month. Calculate what amount they paid as value-added tax (VAT) to the government if the VAT rate is 20%. Assume that the family will spend their entire monthly income.
• Dices
  We will throw two dice. What is the probability that the ratio between numbers on the first and second dice will be 1:2?
• Deposit
  If you deposit 881 euros at the beginning of each year, how much money do we have at 1.6% (compound) interest after 8 years?
• Accidents
  The count of accidents in 1991 caused 8444 women, which is 9%. How many men caused the accidents?
• Green - Red
  We have 4 bags. Each consists of one green and 2 red balls. From each, we pull just one ball. What is the probability that we don't pull any green ball?
• UV radiation
  The glass of 1 mm thickness absorbs 5.3% of UV radiation passing through. How many percent of UV rays absorb glass with a thickness of 2.3 cm, made from 1 mm thick those glasses?
• Gold coin
  The gold coin contains 966 permille pure gold, which is 8.7 g. What is the weight of the coin in grams?
• Climb in percentage
  The height difference between points A and B is 475 m. Calculate the percentage of route climbing if the horizontal distance between places A and B is 7.4 km.
• Wood
  Wood contains 12% water. One m³ of wood weighs 650 kg. How many liters of water does it contain?
• Resort
  In a completely crowded resort, 30% of the Czech Republic quarter visitors were from Slovakia, and the rest, 135, came from Germany. What capacity has the resort had?
• Earth's surface
  The greater part of the Earth's surface (r = 6371 km) is covered by oceans; their area is approximately 71% of the Earth's surface. What is the approximate area of the land?

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