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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 425 · 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 ₹580 to ₹725. By what percent did it go up?
  2. 2.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  3. 3.A water tank holds 2120 litres. 50% of the water is used. How many litres are left?
  4. 4.A water tank holds 1500 litres. 15% of the water is used. How many litres are left?
  5. 5.A water tank holds 800 litres. 15% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹740 to ₹592. By what percent did it come down?
  7. 7.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹240 to ₹180. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹3520 to ₹1760. By what percent did it come down?
  10. 10.A water tank holds 2760 litres. 10% of the water is used. How many litres are left?
  11. 11.A water tank holds 2520 litres. 15% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹1060. It goes up by 25%. What is the new price (in ₹)?
  13. 13.The price of a school bag changes from ₹1980 to ₹2178. By what percent did it go up?
  14. 14.A water tank holds 3740 litres. 25% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹3880 to ₹4268. By what percent did it go up?
  16. 16.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹1460 to ₹730. By what percent did it come down?
  18. 18.A town has 3920 people. Its population grows by 50%. How many people live there now?
  19. 19.A water tank holds 2860 litres. 10% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹3140 to ₹3454. By what percent did it go up?
  21. 21.A water tank holds 4620 litres. 50% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹920 to ₹782. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹440 to ₹396. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹3060 to ₹2907. By what percent did it come down?
  25. 25.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  26. 26.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  27. 27.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  28. 28.A water tank holds 2860 litres. 5% of the water is used. How many litres are left?
  29. 29.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  31. 31.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 340 litres. 50% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1660 to ₹2490. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹1360 to ₹1496. By what percent did it go up?
  35. 35.The price of a bicycle is ₹3360. It goes up by 15%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹720 to ₹504. By what percent did it come down?
  37. 37.The price of a school bag changes from ₹3300 to ₹4125. By what percent did it go up?
  38. 38.A water tank holds 640 litres. 25% of the water is used. How many litres are left?
  39. 39.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  40. 40.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =

Answer key

  1. 25
  2. 58
  3. 1060
  4. 1275
  5. 680
  6. 20
  7. 32
  8. 25
  9. 50
  10. 2484
  11. 2142
  12. 1325
  13. 10
  14. 2805
  15. 10
  16. 32.25
  17. 50
  18. 5880
  19. 2574
  20. 10
  21. 2310
  22. 15
  23. 10
  24. 5
  25. 46
  26. 40.5
  27. 44
  28. 2717
  29. 26
  30. 10.25
  31. 57.5
  32. 170
  33. 50
  34. 10
  35. 3864
  36. 30
  37. 25
  38. 480
  39. 80
  40. 110

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