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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 992 · 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 price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  2. 2.A water tank holds 2100 litres. 40% of the water is used. How many litres are left?
  3. 3.A water tank holds 4940 litres. 50% of the water is used. How many litres are left?
  4. 4.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  5. 5.A town has 120 people. Its population grows by 5%. How many people live there now?
  6. 6.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  7. 7.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  8. 8.The price of a bicycle is ₹3940. It goes up by 40%. What is the new price (in ₹)?
  9. 9.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹3800 to ₹4180. By what percent did it go up?
  11. 11.A water tank holds 660 litres. 15% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹360 to ₹450. By what percent did it go up?
  13. 13.A water tank holds 1680 litres. 5% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹2480 to ₹2728. By what percent did it go up?
  15. 15.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  16. 16.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹1280. It goes up by 30%. What is the new price (in ₹)?
  18. 18.A town has 3600 people. Its population grows by 5%. How many people live there now?
  19. 19.A water tank holds 1320 litres. 5% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹4000 to ₹4400. By what percent did it go up?
  21. 21.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹180 to ₹162. By what percent did it come down?
  23. 23.A town has 4260 people. Its population grows by 40%. How many people live there now?
  24. 24.The price of a school bag changes from ₹460 to ₹483. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹3180 to ₹3021. By what percent did it come down?
  26. 26.A water tank holds 540 litres. 30% of the water is used. How many litres are left?
  27. 27.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  28. 28.The price of a school bag changes from ₹280 to ₹322. By what percent did it go up?
  29. 29.The price of a bicycle is ₹1080. It goes up by 50%. What is the new price (in ₹)?
  30. 30.The price of a bicycle is ₹2180. It goes up by 30%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹4940 to ₹5681. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹4180 to ₹2926. By what percent did it come down?
  33. 33.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹3000. It goes up by 40%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹3940 to ₹4334. By what percent did it go up?
  36. 36.A water tank holds 2460 litres. 40% of the water is used. How many litres are left?
  37. 37.A water tank holds 1120 litres. 40% of the water is used. How many litres are left?
  38. 38.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  39. 39.A shop sells 860 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  40. 40.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =

Answer key

  1. 75
  2. 1260
  3. 2470
  4. 21
  5. 126
  6. 47.5
  7. 27.75
  8. 5516
  9. 19.25
  10. 10
  11. 561
  12. 25
  13. 1596
  14. 10
  15. 55
  16. 32
  17. 1664
  18. 3780
  19. 1254
  20. 10
  21. 80
  22. 10
  23. 5964
  24. 5
  25. 5
  26. 378
  27. 36.25
  28. 15
  29. 1620
  30. 2834
  31. 15
  32. 30
  33. 38
  34. 4200
  35. 10
  36. 1476
  37. 672
  38. 31.25
  39. 1118
  40. 110

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