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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 139 · 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 town has 1820 people. Its population grows by 15%. How many people live there now?
  2. 2.The price of a school bag changes from ₹2600 to ₹1820. By what percent did it come down?
  3. 3.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  4. 4.The price of a bicycle is ₹1420. It goes up by 40%. What is the new price (in ₹)?
  5. 5.The price of a school bag changes from ₹2760 to ₹3864. By what percent did it go up?
  6. 6.A town has 680 people. Its population grows by 25%. How many people live there now?
  7. 7.The price of a school bag changes from ₹4940 to ₹5434. By what percent did it go up?
  8. 8.The price of a school bag changes from ₹820 to ₹1230. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹420 to ₹630. By what percent did it go up?
  10. 10.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  11. 11.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  12. 12.A shop sells 2680 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  13. 13.The price of a school bag changes from ₹2140 to ₹2033. By what percent did it come down?
  14. 14.A shop sells 640 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  15. 15.A water tank holds 460 litres. 50% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹4700 to ₹7050. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹880 to ₹1320. By what percent did it go up?
  18. 18.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  19. 19.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  20. 20.A water tank holds 2380 litres. 15% of the water is used. How many litres are left?
  21. 21.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 2860 litres. 15% of the water is used. How many litres are left?
  23. 23.A water tank holds 2460 litres. 30% of the water is used. How many litres are left?
  24. 24.A water tank holds 2760 litres. 40% of the water is used. How many litres are left?
  25. 25.A shop sells 3580 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  26. 26.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹1560 to ₹1092. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹440 to ₹660. By what percent did it go up?
  29. 29.The price of a bicycle is ₹680. It goes up by 10%. What is the new price (in ₹)?
  30. 30.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  31. 31.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹1820 to ₹1911. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹3600 to ₹3780. By what percent did it go up?
  34. 34.A water tank holds 4920 litres. 5% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹2460 to ₹1230. By what percent did it come down?
  36. 36.The price of a bicycle is ₹3660. It goes up by 5%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹1740 to ₹1218. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹3360 to ₹3192. By what percent did it come down?
  39. 39.The price of a bicycle is ₹3840. It goes up by 20%. What is the new price (in ₹)?
  40. 40.A water tank holds 760 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 2093
  2. 30
  3. 65
  4. 1988
  5. 40
  6. 850
  7. 10
  8. 50
  9. 50
  10. 6.25
  11. 64
  12. 2814
  13. 5
  14. 896
  15. 230
  16. 50
  17. 50
  18. 14
  19. 57.5
  20. 2023
  21. 56.25
  22. 2431
  23. 1722
  24. 1656
  25. 4654
  26. 24
  27. 30
  28. 50
  29. 748
  30. 26.5
  31. 38
  32. 5
  33. 5
  34. 4674
  35. 50
  36. 3843
  37. 30
  38. 5
  39. 4608
  40. 722

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