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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 43 · 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 440 litres. 30% of the water is used. How many litres are left?
  2. 2.A water tank holds 500 litres. 20% of the water is used. How many litres are left?
  3. 3.A town has 640 people. Its population grows by 10%. How many people live there now?
  4. 4.A shop sells 3680 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  5. 5.The price of a bicycle is ₹2160. It goes up by 5%. What is the new price (in ₹)?
  6. 6.A price comes down by 20% 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 ₹3520 to ₹2816. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹4100 to ₹4715. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹3240 to ₹4212. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹2620 to ₹2096. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹780 to ₹624. By what percent did it come down?
  12. 12.A town has 4840 people. Its population grows by 5%. How many people live there now?
  13. 13.A town has 1380 people. Its population grows by 25%. How many people live there now?
  14. 14.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  15. 15.A water tank holds 3320 litres. 20% of the water is used. How many litres are left?
  16. 16.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  17. 17.A town has 3380 people. Its population grows by 10%. How many people live there now?
  18. 18.The price of a bicycle is ₹4320. It goes up by 25%. What is the new price (in ₹)?
  19. 19.The price of a bicycle is ₹4480. It goes up by 15%. What is the new price (in ₹)?
  20. 20.A town has 3140 people. Its population grows by 50%. How many people live there now?
  21. 21.The price of a bicycle is ₹2240. It goes up by 5%. What is the new price (in ₹)?
  22. 22.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  23. 23.The price of a bicycle is ₹3140. It goes up by 50%. What is the new price (in ₹)?
  24. 24.The price of a school bag changes from ₹3580 to ₹5370. By what percent did it go up?
  25. 25.A town has 680 people. Its population grows by 5%. How many people live there now?
  26. 26.The price of a school bag changes from ₹1260 to ₹1890. By what percent did it go up?
  27. 27.The price of a bicycle is ₹2260. It goes up by 20%. What is the new price (in ₹)?
  28. 28.A water tank holds 900 litres. 30% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹4520 to ₹6780. By what percent did it go up?
  30. 30.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  31. 31.A town has 1940 people. Its population grows by 50%. How many people live there now?
  32. 32.The price of a bicycle is ₹200. It goes up by 15%. What is the new price (in ₹)?
  33. 33.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹2200 to ₹1760. By what percent did it come down?
  35. 35.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  36. 36.A water tank holds 4000 litres. 15% of the water is used. How many litres are left?
  37. 37.A water tank holds 820 litres. 25% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹520 to ₹572. By what percent did it go up?
  39. 39.A water tank holds 1740 litres. 40% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹2620. It goes up by 20%. What is the new price (in ₹)?

Answer key

  1. 308
  2. 400
  3. 704
  4. 4232
  5. 2268
  6. 28
  7. 20
  8. 15
  9. 30
  10. 20
  11. 20
  12. 5082
  13. 1725
  14. 95
  15. 2656
  16. 75
  17. 3718
  18. 5400
  19. 5152
  20. 4710
  21. 2352
  22. 52.5
  23. 4710
  24. 50
  25. 714
  26. 50
  27. 2712
  28. 630
  29. 50
  30. 36
  31. 2910
  32. 230
  33. 56
  34. 20
  35. 4
  36. 3400
  37. 615
  38. 10
  39. 1044
  40. 3144

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