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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 565 · 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 1180 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹440 to ₹572. By what percent did it go up?
  3. 3.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 4680 litres. 40% of the water is used. How many litres are left?
  5. 5.A water tank holds 3580 litres. 50% of the water is used. How many litres are left?
  6. 6.A water tank holds 4620 litres. 10% of the water is used. How many litres are left?
  7. 7.A shop sells 1220 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.The price of a school bag changes from ₹360 to ₹504. By what percent did it go up?
  9. 9.A water tank holds 4700 litres. 5% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹980 to ₹1127. By what percent did it go up?
  11. 11.The price of a bicycle is ₹4660. It goes up by 25%. What is the new price (in ₹)?
  12. 12.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  13. 13.The price of a school bag changes from ₹940 to ₹1128. By what percent did it go up?
  14. 14.A water tank holds 2460 litres. 10% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹2120 to ₹1484. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹1560 to ₹2028. By what percent did it go up?
  17. 17.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  18. 18.A shop sells 2360 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  19. 19.The price of a bicycle is ₹900. It goes up by 20%. What is the new price (in ₹)?
  20. 20.A town has 3440 people. Its population grows by 25%. How many people live there now?
  21. 21.The price of a school bag changes from ₹2820 to ₹3243. By what percent did it go up?
  22. 22.A shop sells 2180 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  23. 23.A town has 3780 people. Its population grows by 10%. How many people live there now?
  24. 24.The price of a school bag changes from ₹3680 to ₹2208. By what percent did it come down?
  25. 25.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  27. 27.A shop sells 2060 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  28. 28.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  29. 29.A water tank holds 2080 litres. 50% of the water is used. How many litres are left?
  30. 30.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹4680 to ₹4212. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹840 to ₹756. By what percent did it come down?
  33. 33.A shop sells 4060 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹3660 to ₹2928. By what percent did it come down?
  35. 35.A water tank holds 3820 litres. 40% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹3000. It goes up by 50%. What is the new price (in ₹)?
  37. 37.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  38. 38.The price of a bicycle is ₹3600. It goes up by 10%. What is the new price (in ₹)?
  39. 39.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  40. 40.The price of a bicycle is ₹1380. It goes up by 20%. What is the new price (in ₹)?

Answer key

  1. 1003
  2. 30
  3. 43
  4. 2808
  5. 1790
  6. 4158
  7. 1281
  8. 40
  9. 4465
  10. 15
  11. 5825
  12. 23.5
  13. 20
  14. 2214
  15. 30
  16. 30
  17. 72.5
  18. 2714
  19. 1080
  20. 4300
  21. 15
  22. 3270
  23. 4158
  24. 40
  25. 96
  26. 32
  27. 2884
  28. 33.5
  29. 1040
  30. 36.5
  31. 10
  32. 10
  33. 4669
  34. 20
  35. 2292
  36. 4500
  37. 75
  38. 3960
  39. 52.5
  40. 1656

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