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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 568 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.The price of a school bag changes from ₹460 to ₹414. By what percent did it come down?
  2. 2.A water tank holds 2620 litres. 25% of the water is used. How many litres are left?
  3. 3.A water tank holds 1780 litres. 10% of the water is used. How many litres are left?
  4. 4.A town has 4140 people. Its population grows by 30%. How many people live there now?
  5. 5.The price of a school bag changes from ₹1900 to ₹1330. By what percent did it come down?
  6. 6.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  7. 7.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  8. 8.The price of a bicycle is ₹4400. It goes up by 20%. What is the new price (in ₹)?
  9. 9.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  10. 10.The price of a school bag changes from ₹4500 to ₹5175. By what percent did it go up?
  11. 11.A town has 4760 people. Its population grows by 30%. How many people live there now?
  12. 12.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹1820 to ₹2548. By what percent did it go up?
  15. 15.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  16. 16.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  17. 17.A water tank holds 2900 litres. 15% of the water is used. How many litres are left?
  18. 18.A shop sells 4860 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹280 to ₹210. By what percent did it come down?
  20. 20.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 1820 litres. 15% of the water is used. How many litres are left?
  22. 22.A shop sells 2440 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  23. 23.The price of a bicycle is ₹460. It goes up by 5%. What is the new price (in ₹)?
  24. 24.The price of a school bag changes from ₹700 to ₹420. By what percent did it come down?
  25. 25.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  26. 26.A water tank holds 4400 litres. 10% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹4660 to ₹3961. By what percent did it come down?
  28. 28.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  29. 29.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹1880 to ₹1786. By what percent did it come down?
  31. 31.A shop sells 4760 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  32. 32.A shop sells 1580 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  33. 33.A water tank holds 2080 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹4540 to ₹2724. By what percent did it come down?
  35. 35.A water tank holds 1480 litres. 25% of the water is used. How many litres are left?
  36. 36.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  37. 37.A shop sells 3240 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  38. 38.The price of a bicycle is ₹640. It goes up by 30%. What is the new price (in ₹)?
  39. 39.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 4660 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 10
  2. 1965
  3. 1602
  4. 5382
  5. 30
  6. 4.5
  7. 37
  8. 5280
  9. 87.5
  10. 15
  11. 6188
  12. 95
  13. 26
  14. 40
  15. 57.5
  16. 57.5
  17. 2465
  18. 5103
  19. 25
  20. 65
  21. 1547
  22. 2928
  23. 483
  24. 40
  25. 19
  26. 3960
  27. 15
  28. 56
  29. 72.5
  30. 5
  31. 4998
  32. 1659
  33. 1560
  34. 40
  35. 1110
  36. 96
  37. 4212
  38. 832
  39. 43
  40. 4194

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