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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 804 · 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 town has 2780 people. Its population grows by 5%. How many people live there now?
  2. 2.A water tank holds 2260 litres. 15% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2260 to ₹1356. By what percent did it come down?
  4. 4.A water tank holds 2600 litres. 15% of the water is used. How many litres are left?
  5. 5.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 2000 litres. 5% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹4200. It goes up by 40%. What is the new price (in ₹)?
  8. 8.A shop sells 1680 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹1640 to ₹1394. By what percent did it come down?
  10. 10.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  11. 11.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  12. 12.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  13. 13.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹2540 to ₹1270. By what percent did it come down?
  16. 16.A town has 4800 people. Its population grows by 20%. How many people live there now?
  17. 17.The price of a school bag changes from ₹4600 to ₹2760. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹2640 to ₹1848. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹4200 to ₹5880. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹3040 to ₹2584. By what percent did it come down?
  21. 21.The price of a bicycle is ₹1780. It goes up by 20%. What is the new price (in ₹)?
  22. 22.A water tank holds 4060 litres. 10% of the water is used. How many litres are left?
  23. 23.A water tank holds 4000 litres. 15% of the water is used. How many litres are left?
  24. 24.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  25. 25.The price of a bicycle is ₹3580. It goes up by 30%. What is the new price (in ₹)?
  26. 26.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  27. 27.A water tank holds 4580 litres. 5% of the water is used. How many litres are left?
  28. 28.A water tank holds 60 litres. 5% of the water is used. How many litres are left?
  29. 29.A shop sells 4640 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹680 to ₹782. By what percent did it go up?
  31. 31.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  32. 32.A town has 2600 people. Its population grows by 30%. How many people live there now?
  33. 33.A water tank holds 2520 litres. 10% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹2360 to ₹1888. By what percent did it come down?
  35. 35.The price of a bicycle is ₹2360. It goes up by 30%. What is the new price (in ₹)?
  36. 36.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  37. 37.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  38. 38.The price of a bicycle is ₹2380. It goes up by 10%. What is the new price (in ₹)?
  39. 39.A water tank holds 1120 litres. 20% of the water is used. How many litres are left?
  40. 40.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =

Answer key

  1. 2919
  2. 1921
  3. 40
  4. 2210
  5. 50
  6. 1900
  7. 5880
  8. 1848
  9. 15
  10. 14
  11. 38
  12. 47.5
  13. 43
  14. 110
  15. 50
  16. 5760
  17. 40
  18. 30
  19. 40
  20. 15
  21. 2136
  22. 3654
  23. 3400
  24. 70
  25. 4654
  26. 44
  27. 4351
  28. 57
  29. 5800
  30. 15
  31. 62.5
  32. 3380
  33. 2268
  34. 20
  35. 3068
  36. 62.5
  37. 43
  38. 2618
  39. 896
  40. 43.75

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