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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 42 · 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 bicycle is ₹100. It goes up by 20%. What is the new price (in ₹)?
  2. 2.A water tank holds 2480 litres. 15% of the water is used. How many litres are left?
  3. 3.A water tank holds 3340 litres. 25% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹2440 to ₹3050. By what percent did it go up?
  5. 5.A water tank holds 1300 litres. 20% of the water is used. How many litres are left?
  6. 6.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 4820 litres. 5% of the water is used. How many litres are left?
  8. 8.A water tank holds 2400 litres. 40% of the water is used. How many litres are left?
  9. 9.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹100 to ₹140. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹2200 to ₹2090. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹460 to ₹506. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹380 to ₹399. By what percent did it go up?
  14. 14.A water tank holds 180 litres. 50% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹900 to ₹675. By what percent did it come down?
  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 price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹60 to ₹48. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹3120 to ₹2808. By what percent did it come down?
  20. 20.A water tank holds 1400 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹500 to ₹300. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹4560 to ₹4788. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹4280 to ₹4922. By what percent did it go up?
  24. 24.A shop sells 1120 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  25. 25.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  26. 26.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  27. 27.A water tank holds 580 litres. 10% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹360 to ₹414. By what percent did it go up?
  29. 29.A town has 1500 people. Its population grows by 30%. How many people live there now?
  30. 30.The price of a school bag changes from ₹4860 to ₹6318. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹4560 to ₹3876. By what percent did it come down?
  32. 32.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  33. 33.The price of a bicycle is ₹200. It goes up by 5%. What is the new price (in ₹)?
  34. 34.The price of a bicycle is ₹3460. It goes up by 30%. What is the new price (in ₹)?
  35. 35.A shop sells 4580 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  36. 36.The price of a bicycle is ₹600. It goes up by 30%. What is the new price (in ₹)?
  37. 37.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹4760 to ₹6664. By what percent did it go up?
  39. 39.A shop sells 4120 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  40. 40.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =

Answer key

  1. 120
  2. 2108
  3. 2505
  4. 25
  5. 1040
  6. 69
  7. 4579
  8. 1440
  9. 60
  10. 40
  11. 5
  12. 10
  13. 5
  14. 90
  15. 25
  16. 75
  17. 52.5
  18. 20
  19. 10
  20. 1190
  21. 40
  22. 5
  23. 15
  24. 1680
  25. 37
  26. 23.5
  27. 522
  28. 15
  29. 1950
  30. 30
  31. 15
  32. 56
  33. 210
  34. 4498
  35. 6870
  36. 780
  37. 21
  38. 40
  39. 4738
  40. 19

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