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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 555 · 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.A water tank holds 760 litres. 20% of the water is used. How many litres are left?
  2. 2.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹1940 to ₹2037. By what percent did it go up?
  4. 4.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  5. 5.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  6. 6.The price of a bicycle is ₹4040. It goes up by 25%. What is the new price (in ₹)?
  7. 7.The price of a bicycle is ₹1420. It goes up by 20%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹180 to ₹252. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹900 to ₹1080. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹3600 to ₹4320. By what percent did it go up?
  11. 11.A water tank holds 3920 litres. 5% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹180 to ₹144. By what percent did it come down?
  13. 13.A water tank holds 1000 litres. 50% of the water is used. How many litres are left?
  14. 14.A water tank holds 3120 litres. 5% of the water is used. How many litres are left?
  15. 15.The price of a bicycle is ₹3420. It goes up by 25%. What is the new price (in ₹)?
  16. 16.A water tank holds 4060 litres. 5% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹2460. It goes up by 40%. What is the new price (in ₹)?
  18. 18.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  19. 19.A town has 2860 people. Its population grows by 10%. How many people live there now?
  20. 20.A water tank holds 880 litres. 30% of the water is used. How many litres are left?
  21. 21.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹340 to ₹408. By what percent did it go up?
  23. 23.A town has 4840 people. Its population grows by 30%. How many people live there now?
  24. 24.The price of a school bag changes from ₹2820 to ₹3948. By what percent did it go up?
  25. 25.A water tank holds 2820 litres. 30% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹320 to ₹288. By what percent did it come down?
  27. 27.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  28. 28.A water tank holds 2460 litres. 10% of the water is used. How many litres are left?
  29. 29.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  30. 30.A water tank holds 3420 litres. 25% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹1240 to ₹1178. By what percent did it come down?
  32. 32.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  33. 33.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  34. 34.A water tank holds 2080 litres. 10% of the water is used. How many litres are left?
  35. 35.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  36. 36.A water tank holds 3280 litres. 5% of the water is used. How many litres are left?
  37. 37.A water tank holds 1400 litres. 5% of the water is used. How many litres are left?
  38. 38.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹760 to ₹798. By what percent did it go up?
  40. 40.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =

Answer key

  1. 608
  2. 37.5
  3. 5
  4. 28
  5. 51
  6. 5050
  7. 1704
  8. 40
  9. 20
  10. 20
  11. 3724
  12. 20
  13. 500
  14. 2964
  15. 4275
  16. 3857
  17. 3444
  18. 32.5
  19. 3146
  20. 616
  21. 65
  22. 20
  23. 6292
  24. 40
  25. 1974
  26. 10
  27. 62.5
  28. 2214
  29. 19
  30. 2565
  31. 5
  32. 49.5
  33. 3.5
  34. 1872
  35. 60
  36. 3116
  37. 1330
  38. 24
  39. 5
  40. 57.5

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