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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 338 · 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 ₹2160. It goes up by 30%. What is the new price (in ₹)?
  2. 2.A water tank holds 2600 litres. 15% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹220 to ₹286. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹2320 to ₹3016. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹1820 to ₹1092. By what percent did it come down?
  6. 6.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  7. 7.The price of a school bag changes from ₹1440 to ₹2160. By what percent did it go up?
  8. 8.A water tank holds 3420 litres. 25% of the water is used. How many litres are left?
  9. 9.A water tank holds 3820 litres. 10% of the water is used. How many litres are left?
  10. 10.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  11. 11.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  12. 12.A water tank holds 3000 litres. 50% of the water is used. How many litres are left?
  13. 13.A water tank holds 2820 litres. 40% of the water is used. How many litres are left?
  14. 14.A water tank holds 480 litres. 15% of the water is used. How many litres are left?
  15. 15.A town has 2140 people. Its population grows by 40%. How many people live there now?
  16. 16.A shop sells 2340 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹3700 to ₹4440. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹2760 to ₹1932. By what percent did it come down?
  19. 19.A shop sells 2420 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  20. 20.A water tank holds 1160 litres. 15% of the water is used. How many litres are left?
  21. 21.A water tank holds 4260 litres. 50% of the water is used. How many litres are left?
  22. 22.A shop sells 1040 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  23. 23.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  24. 24.The price of a bicycle is ₹80. It goes up by 20%. What is the new price (in ₹)?
  25. 25.The price of a bicycle is ₹4840. It goes up by 40%. What is the new price (in ₹)?
  26. 26.A water tank holds 3300 litres. 15% of the water is used. How many litres are left?
  27. 27.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  28. 28.The price of a bicycle is ₹4740. It goes up by 5%. What is the new price (in ₹)?
  29. 29.A water tank holds 2040 litres. 25% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹720. It goes up by 15%. What is the new price (in ₹)?
  31. 31.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  32. 32.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  33. 33.A shop sells 3320 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  34. 34.The price of a bicycle is ₹1320. It goes up by 30%. What is the new price (in ₹)?
  35. 35.A shop sells 2020 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹660 to ₹825. By what percent did it go up?
  37. 37.The price of a bicycle is ₹180. It goes up by 30%. What is the new price (in ₹)?
  38. 38.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  39. 39.The price of a bicycle is ₹4420. It goes up by 25%. What is the new price (in ₹)?
  40. 40.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 2808
  2. 2210
  3. 30
  4. 30
  5. 40
  6. 52.5
  7. 50
  8. 2565
  9. 3438
  10. 15.5
  11. 14.5
  12. 1500
  13. 1692
  14. 408
  15. 2996
  16. 2457
  17. 20
  18. 30
  19. 3630
  20. 986
  21. 2130
  22. 1560
  23. 40.5
  24. 96
  25. 6776
  26. 2805
  27. 38
  28. 4977
  29. 1530
  30. 828
  31. 62.5
  32. 65
  33. 4648
  34. 1716
  35. 2424
  36. 25
  37. 234
  38. 35
  39. 5525
  40. 32.5

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