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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 789 · 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 shop sells 780 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  2. 2.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  3. 3.The price of a bicycle is ₹220. It goes up by 25%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹900 to ₹990. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹460 to ₹506. By what percent did it go up?
  6. 6.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  7. 7.The price of a school bag changes from ₹4720 to ₹6136. By what percent did it go up?
  8. 8.The price of a school bag changes from ₹4720 to ₹4956. By what percent did it go up?
  9. 9.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  10. 10.The price of a school bag changes from ₹1440 to ₹2016. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹780 to ₹858. By what percent did it go up?
  12. 12.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  13. 13.A shop sells 2460 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  14. 14.A water tank holds 840 litres. 10% of the water is used. How many litres are left?
  15. 15.The price of a bicycle is ₹360. It goes up by 20%. What is the new price (in ₹)?
  16. 16.A water tank holds 4160 litres. 5% of the water is used. How many litres are left?
  17. 17.A water tank holds 1180 litres. 10% of the water is used. How many litres are left?
  18. 18.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹320 to ₹448. By what percent did it go up?
  20. 20.A water tank holds 2760 litres. 10% of the water is used. How many litres are left?
  21. 21.A shop sells 3200 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹2340 to ₹2574. By what percent did it go up?
  23. 23.A shop sells 4540 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹4020 to ₹6030. By what percent did it go up?
  25. 25.The price of a bicycle is ₹3700. It goes up by 10%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹4640 to ₹6960. By what percent did it go up?
  27. 27.A water tank holds 1860 litres. 30% of the water is used. How many litres are left?
  28. 28.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  29. 29.The price of a bicycle is ₹4020. It goes up by 40%. What is the new price (in ₹)?
  30. 30.A town has 3760 people. Its population grows by 50%. How many people live there now?
  31. 31.A shop sells 3880 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  32. 32.A town has 2220 people. Its population grows by 30%. How many people live there now?
  33. 33.The price of a school bag changes from ₹4360 to ₹2616. By what percent did it come down?
  34. 34.A town has 3220 people. Its population grows by 15%. How many people live there now?
  35. 35.A water tank holds 1860 litres. 10% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹3320 to ₹4316. By what percent did it go up?
  37. 37.A town has 2260 people. Its population grows by 15%. How many people live there now?
  38. 38.The price of a bicycle is ₹1400. It goes up by 20%. What is the new price (in ₹)?
  39. 39.A shop sells 1160 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  40. 40.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =

Answer key

  1. 897
  2. 43.75
  3. 275
  4. 10
  5. 10
  6. 55
  7. 30
  8. 5
  9. 32.25
  10. 40
  11. 10
  12. 31.25
  13. 2952
  14. 756
  15. 432
  16. 3952
  17. 1062
  18. 82
  19. 40
  20. 2484
  21. 3680
  22. 10
  23. 5448
  24. 50
  25. 4070
  26. 50
  27. 1302
  28. 17
  29. 5628
  30. 5640
  31. 4268
  32. 2886
  33. 40
  34. 3703
  35. 1674
  36. 30
  37. 2599
  38. 1680
  39. 1392
  40. 4.5

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