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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 342 · 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 3620 litres. 20% of the water is used. How many litres are left?
  2. 2.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  3. 3.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  4. 4.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  5. 5.A town has 3060 people. Its population grows by 20%. How many people live there now?
  6. 6.A water tank holds 2680 litres. 50% of the water is used. How many litres are left?
  7. 7.A shop sells 1440 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  8. 8.The price of a bicycle is ₹4660. It goes up by 15%. What is the new price (in ₹)?
  9. 9.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  10. 10.The price of a school bag changes from ₹4320 to ₹4536. By what percent did it go up?
  11. 11.A water tank holds 2460 litres. 20% of the water is used. How many litres are left?
  12. 12.A shop sells 600 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.A water tank holds 1880 litres. 30% of the water is used. How many litres are left?
  14. 14.A water tank holds 3820 litres. 10% of the water is used. How many litres are left?
  15. 15.A water tank holds 580 litres. 30% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹60 to ₹78. By what percent did it go up?
  17. 17.A shop sells 1520 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  18. 18.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  19. 19.A water tank holds 2780 litres. 50% of the water is used. How many litres are left?
  20. 20.A water tank holds 2160 litres. 15% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹2600 to ₹3250. By what percent did it go up?
  22. 22.A town has 460 people. Its population grows by 15%. How many people live there now?
  23. 23.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹3180. It goes up by 25%. What is the new price (in ₹)?
  26. 26.A water tank holds 120 litres. 5% of the water is used. How many litres are left?
  27. 27.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹3820 to ₹2674. By what percent did it come down?
  29. 29.The price of a bicycle is ₹500. It goes up by 40%. What is the new price (in ₹)?
  30. 30.The price of a school bag changes from ₹1960 to ₹2254. By what percent did it go up?
  31. 31.A town has 3720 people. Its population grows by 15%. How many people live there now?
  32. 32.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  33. 33.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹400 to ₹440. By what percent did it go up?
  35. 35.A town has 4840 people. Its population grows by 30%. How many people live there now?
  36. 36.A town has 3060 people. Its population grows by 10%. How many people live there now?
  37. 37.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹160 to ₹184. By what percent did it go up?
  39. 39.The price of a bicycle is ₹4920. It goes up by 40%. What is the new price (in ₹)?
  40. 40.The price of a school bag changes from ₹4060 to ₹4466. By what percent did it go up?

Answer key

  1. 2896
  2. 43.75
  3. 27.5
  4. 68
  5. 3672
  6. 1340
  7. 1800
  8. 5359
  9. 26
  10. 5
  11. 1968
  12. 720
  13. 1316
  14. 3438
  15. 406
  16. 30
  17. 2280
  18. 10.25
  19. 1390
  20. 1836
  21. 25
  22. 529
  23. 26.5
  24. 62.5
  25. 3975
  26. 114
  27. 47
  28. 30
  29. 700
  30. 15
  31. 4278
  32. 40.5
  33. 61
  34. 10
  35. 6292
  36. 3366
  37. 50
  38. 15
  39. 6888
  40. 10

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