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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 383 · 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 1380 litres. 15% of the water is used. How many litres are left?
  2. 2.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 3080 litres. 20% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹4820 to ₹5061. By what percent did it go up?
  5. 5.A water tank holds 3720 litres. 15% of the water is used. How many litres are left?
  6. 6.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 4620 litres. 15% of the water is used. How many litres are left?
  8. 8.A shop sells 2600 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  9. 9.The price of a bicycle is ₹60. It goes up by 50%. What is the new price (in ₹)?
  10. 10.The price of a bicycle is ₹1160. It goes up by 40%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹1600 to ₹2080. By what percent did it go up?
  12. 12.A water tank holds 3440 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹1000 to ₹1500. By what percent did it go up?
  14. 14.A water tank holds 1340 litres. 10% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹2000 to ₹2800. By what percent did it go up?
  16. 16.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  17. 17.The price of a bicycle is ₹180. It goes up by 25%. What is the new price (in ₹)?
  18. 18.A water tank holds 1800 litres. 30% of the water is used. How many litres are left?
  19. 19.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹2060 to ₹2163. By what percent did it go up?
  21. 21.A water tank holds 1460 litres. 50% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹3600 to ₹3060. By what percent did it come down?
  23. 23.A water tank holds 3840 litres. 20% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹2940. It goes up by 40%. What is the new price (in ₹)?
  25. 25.A water tank holds 1660 litres. 15% of the water is used. How many litres are left?
  26. 26.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  27. 27.A shop sells 3380 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  28. 28.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 3640 litres. 40% of the water is used. How many litres are left?
  30. 30.A water tank holds 140 litres. 10% of the water is used. How many litres are left?
  31. 31.A water tank holds 280 litres. 5% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹700 to ₹980. By what percent did it go up?
  33. 33.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  34. 34.A town has 3700 people. Its population grows by 25%. How many people live there now?
  35. 35.A shop sells 4600 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  36. 36.The price of a bicycle is ₹3880. It goes up by 30%. What is the new price (in ₹)?
  37. 37.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  38. 38.A water tank holds 560 litres. 10% of the water is used. How many litres are left?
  39. 39.A water tank holds 2060 litres. 15% of the water is used. How many litres are left?
  40. 40.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =

Answer key

  1. 1173
  2. 61
  3. 2464
  4. 5
  5. 3162
  6. 32.25
  7. 3927
  8. 2990
  9. 90
  10. 1624
  11. 30
  12. 3268
  13. 50
  14. 1206
  15. 40
  16. 43.75
  17. 225
  18. 1260
  19. 82
  20. 5
  21. 730
  22. 15
  23. 3072
  24. 4116
  25. 1411
  26. 14.5
  27. 5070
  28. 26.5
  29. 2184
  30. 126
  31. 266
  32. 40
  33. 8
  34. 4625
  35. 5980
  36. 5044
  37. 20
  38. 504
  39. 1751
  40. 72.5

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