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	-	60%	-	90%	+	75%	=
100	+	90%	-	50%	+	55%	=
5	+	80%	+	50%	+	85%	=
10	-	50%	-	40%	-	20%	=
90	+	50%	-	80%	+	20%	=
55	-	40%	+	20%	-	20%	=
45	-	80%	+	50%	-	50%	=
25	-	80%	+	40%	+	60%	=
25	+	20%	+	70%	+	15%	=
70	+	60%	+	70%	-	35%	=

Percentage in word math problems

• Volatile percents
  Peter is working as a forex trader. He suffered a loss of 60.1 percent. Calculate what percentage you must now earn to lift from loss.
• 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
• Dice
  How many times must you throw the dice, and was the probability of throwing at least one pětky greater than 70%?
• Election mathematics
  In elections, 8 political parties received this share of voters: strana A ; 56 % strana B ; 11.9 % strana C ; 11.7 % strana D ; 8.8 % strana E ; 6.3 % strana F ; 5.1 % strana G ; 0.2 % Calculate what the shares acquired in the parliament if a quorum is 5%
• Lunch for free
  Gastro tickets are "free," so they should be retained. Many employees in Slovakia approve of free goods, such as a free gastro ticket per day of work. The company issuing gastro tickets receives a 4.3% fee on the total amount of money spent on tickets. Ca
• Sphere fall
  How much percent fall volume of a sphere if the diameter decreases 3×?
• Discounts on rail (ZSSK)
  The railway company ZSSK offers a discount of 40% (SENIOR RAILPLUS) for 9.9 Eur/year. Calculate the real discount rate as a percentage, where passengers will travel 5 Eur per week.
• Human buying irrationality
  I longer watch processors for Socket A on the secondhand market, Athlon XP 1.86GHz with a PR rating of 2500+ costs $7, and Athlon XP 2.16Ghz with a PR rating of 3000+ currently costs $16. Calculate: About what percentage of the Athlon XP 2.16Ghz is more p
• Alcohol 2
  Two types of alcohol, one 46% and second 64%, give 16 liters of 54% alcohol. How many liters of each type are in the mixture?
• Barrel of oil
  The barrel of oil weighs 283 kg. When it molded 26% oil, it weighed 216 kg. What is the mass of the empty barrel?
• Demographics
  The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase in population?
• 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)?
• Cone and cube
  About what percentage has cone with base radius r larger volume than a same high cube with square base with edge length r?
• Rectangles
  How many rectangles with area 8855 cm² whose sides are natural numbers?
• River
  Calculate how many permille river Hudson average falls, if on section long 952 km flowing water from 1231 m AMSL to 131 m AMSL.

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