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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 300 · 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 ₹3180 to ₹3975. By what percent did it go up?
  2. 2.A shop sells 4760 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  3. 3.The price of a bicycle is ₹800. It goes up by 10%. What is the new price (in ₹)?
  4. 4.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  5. 5.A water tank holds 2080 litres. 50% of the water is used. How many litres are left?
  6. 6.A water tank holds 3540 litres. 30% of the water is used. How many litres are left?
  7. 7.A town has 4940 people. Its population grows by 50%. How many people live there now?
  8. 8.A water tank holds 4780 litres. 15% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹100 to ₹50. By what percent did it come down?
  10. 10.A shop sells 1640 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  11. 11.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  12. 12.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹1700 to ₹1785. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹2000 to ₹1900. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹2920 to ₹3650. By what percent did it go up?
  16. 16.The price of a bicycle is ₹3380. It goes up by 15%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹140. It goes up by 25%. What is the new price (in ₹)?
  18. 18.A shop sells 640 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹4580 to ₹2290. By what percent did it come down?
  20. 20.A water tank holds 3340 litres. 50% of the water is used. How many litres are left?
  21. 21.A town has 1080 people. Its population grows by 50%. How many people live there now?
  22. 22.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  23. 23.The price of a bicycle is ₹2480. It goes up by 40%. What is the new price (in ₹)?
  24. 24.The price of a school bag changes from ₹1460 to ₹1606. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹4720 to ₹4484. By what percent did it come down?
  26. 26.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  27. 27.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  28. 28.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹60 to ₹84. By what percent did it go up?
  30. 30.A water tank holds 620 litres. 15% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹760 to ₹532. By what percent did it come down?
  32. 32.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  33. 33.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  34. 34.A town has 3060 people. Its population grows by 25%. How many people live there now?
  35. 35.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 1400 litres. 15% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹1140 to ₹1026. By what percent did it come down?
  38. 38.A shop sells 1460 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  39. 39.A town has 300 people. Its population grows by 30%. How many people live there now?
  40. 40.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 25
  2. 7140
  3. 880
  4. 36.5
  5. 1040
  6. 2478
  7. 7410
  8. 4063
  9. 50
  10. 2460
  11. 26
  12. 56
  13. 5
  14. 5
  15. 25
  16. 3887
  17. 175
  18. 832
  19. 50
  20. 1670
  21. 1620
  22. 19.25
  23. 3472
  24. 10
  25. 5
  26. 47.5
  27. 32
  28. 72.5
  29. 40
  30. 527
  31. 30
  32. 32.5
  33. 52.5
  34. 3825
  35. 68
  36. 1190
  37. 10
  38. 2044
  39. 390
  40. 65

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