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:

100	+	50%	-	40%	=
78	+	73%	+	20%	=
66	+	22%	-	40%	=
33	+	78%	-	90%	=
23	+	90%	-	40%	=
93	+	63%	-	90%	=
53	-	58%	-	70%	=
69	-	80%	-	90%	=
26	-	59%	-	90%	=
51	-	28%	-	40%	=

Percentage in word math problems

• Engineer bug
  Comical errors, disputes and plots arise when converting physical units. The core of today's dispute was the price of natural gas. The unit was changed - from the natural unit of cubic meter of gas to the unit kWh. The goal was to be able to compare the p
• 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
• Compound interest
  Calculate the time it takes for a bank deposit earning 2.6% p.a. interest to double.
• Metal alloy
  What is the metal ratio in the alloy in the 50 tonnes of steel to 30 kg nickel?
• 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.
• Blood
  In the human body, the blood is about 7.3% body weight. How many kilograms of blood are in the human body with a weight of 91 kg?
• Money
  Everyone complains about a lack of money. In reality, there is no shortage of money — only a relative scarcity of goods and services. By what percentage would the prices of all goods and services immediately rise if everyone suddenly had 9 times more mone
• 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?
• Work
  Workers work five days a week and have 28 days of vacation a year. Calculate how many days is out of work and express it as a percentage. Consider that a year has 52 weeks.
• 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?

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