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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 639 · 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 town has 2900 people. Its population grows by 30%. How many people live there now?
  2. 2.A town has 3820 people. Its population grows by 25%. How many people live there now?
  3. 3.A shop sells 4100 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  4. 4.The price of a school bag changes from ₹220 to ₹264. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹520 to ₹260. By what percent did it come down?
  6. 6.A town has 1520 people. Its population grows by 5%. How many people live there now?
  7. 7.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  8. 8.The price of a bicycle is ₹480. It goes up by 10%. What is the new price (in ₹)?
  9. 9.The price of a bicycle is ₹2520. It goes up by 30%. What is the new price (in ₹)?
  10. 10.The price of a bicycle is ₹1220. It goes up by 50%. What is the new price (in ₹)?
  11. 11.A shop sells 4800 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  12. 12.A town has 3860 people. Its population grows by 25%. How many people live there now?
  13. 13.A water tank holds 3440 litres. 15% of the water is used. How many litres are left?
  14. 14.The price of a bicycle is ₹4240. It goes up by 10%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹600 to ₹630. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹4980 to ₹3486. By what percent did it come down?
  17. 17.A water tank holds 3440 litres. 40% of the water is used. How many litres are left?
  18. 18.A water tank holds 2300 litres. 20% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹260 to ₹364. By what percent did it go up?
  20. 20.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  21. 21.A shop sells 4460 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  22. 22.A water tank holds 3880 litres. 10% of the water is used. How many litres are left?
  23. 23.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.The price of a school bag changes from ₹3320 to ₹3486. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹1700 to ₹2040. By what percent did it go up?
  26. 26.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  27. 27.A water tank holds 3160 litres. 10% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹1400 to ₹1680. By what percent did it go up?
  29. 29.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  30. 30.A water tank holds 900 litres. 15% of the water is used. How many litres are left?
  31. 31.A water tank holds 1080 litres. 50% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹1280. It goes up by 25%. What is the new price (in ₹)?
  33. 33.The price of a bicycle is ₹3300. It goes up by 10%. What is the new price (in ₹)?
  34. 34.A town has 1720 people. Its population grows by 20%. How many people live there now?
  35. 35.The price of a bicycle is ₹4920. It goes up by 30%. What is the new price (in ₹)?
  36. 36.A town has 3400 people. Its population grows by 25%. How many people live there now?
  37. 37.The price of a school bag changes from ₹2700 to ₹1350. By what percent did it come down?
  38. 38.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  39. 39.The price of a bicycle is ₹400. It goes up by 40%. What is the new price (in ₹)?
  40. 40.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =

Answer key

  1. 3770
  2. 4775
  3. 5740
  4. 20
  5. 50
  6. 1596
  7. 38
  8. 528
  9. 3276
  10. 1830
  11. 6720
  12. 4825
  13. 2924
  14. 4664
  15. 5
  16. 30
  17. 2064
  18. 1840
  19. 40
  20. 65
  21. 4683
  22. 3492
  23. 75
  24. 5
  25. 20
  26. 18.75
  27. 2844
  28. 20
  29. 14.5
  30. 765
  31. 540
  32. 1600
  33. 3630
  34. 2064
  35. 6396
  36. 4250
  37. 50
  38. 87.5
  39. 560
  40. 37

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