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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 988 · 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 price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  2. 2.A shop sells 3900 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  3. 3.A town has 2780 people. Its population grows by 5%. How many people live there now?
  4. 4.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  5. 5.A town has 2640 people. Its population grows by 15%. How many people live there now?
  6. 6.A shop sells 1080 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  7. 7.The price of a bicycle is ₹3320. It goes up by 25%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹500 to ₹300. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹320 to ₹368. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹4420 to ₹3536. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹3660 to ₹2745. By what percent did it come down?
  12. 12.The price of a bicycle is ₹100. It goes up by 20%. What is the new price (in ₹)?
  13. 13.The price of a bicycle is ₹4140. It goes up by 10%. What is the new price (in ₹)?
  14. 14.The price of a bicycle is ₹1520. It goes up by 25%. What is the new price (in ₹)?
  15. 15.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  16. 16.A shop sells 4880 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  17. 17.A shop sells 2140 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  18. 18.A shop sells 3020 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹4140 to ₹5175. By what percent did it go up?
  20. 20.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.A town has 1560 people. Its population grows by 50%. How many people live there now?
  22. 22.A water tank holds 820 litres. 25% of the water is used. How many litres are left?
  23. 23.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  24. 24.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.A town has 2020 people. Its population grows by 10%. How many people live there now?
  26. 26.A shop sells 820 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  27. 27.The price of a bicycle is ₹360. It goes up by 30%. What is the new price (in ₹)?
  28. 28.The price of a bicycle is ₹3660. It goes up by 5%. What is the new price (in ₹)?
  29. 29.The price of a bicycle is ₹4100. It goes up by 5%. What is the new price (in ₹)?
  30. 30.A water tank holds 980 litres. 30% of the water is used. How many litres are left?
  31. 31.A water tank holds 820 litres. 40% of the water is used. How many litres are left?
  32. 32.A water tank holds 2580 litres. 20% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1440 to ₹1728. By what percent did it go up?
  34. 34.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  35. 35.A shop sells 4440 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹2880 to ₹4320. By what percent did it go up?
  37. 37.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  38. 38.A water tank holds 1420 litres. 25% of the water is used. How many litres are left?
  39. 39.A water tank holds 2900 litres. 40% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹940 to ₹987. By what percent did it go up?

Answer key

  1. 14.5
  2. 5460
  3. 2919
  4. 43.75
  5. 3036
  6. 1134
  7. 4150
  8. 40
  9. 15
  10. 20
  11. 25
  12. 120
  13. 4554
  14. 1900
  15. 18.75
  16. 5612
  17. 2568
  18. 4530
  19. 25
  20. 20.75
  21. 2340
  22. 615
  23. 12.5
  24. 46
  25. 2222
  26. 984
  27. 468
  28. 3843
  29. 4305
  30. 686
  31. 492
  32. 2064
  33. 20
  34. 23.5
  35. 5328
  36. 50
  37. 23.5
  38. 1065
  39. 1740
  40. 5

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