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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 561 · 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 3580 litres. 5% of the water is used. How many litres are left?
  2. 2.A water tank holds 4800 litres. 15% of the water is used. How many litres are left?
  3. 3.A water tank holds 60 litres. 20% of the water is used. How many litres are left?
  4. 4.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  5. 5.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  6. 6.The price of a bicycle is ₹460. It goes up by 20%. What is the new price (in ₹)?
  7. 7.A water tank holds 1460 litres. 5% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹2060 to ₹1030. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹3260 to ₹2771. By what percent did it come down?
  10. 10.The price of a bicycle is ₹3360. It goes up by 10%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹280 to ₹140. By what percent did it come down?
  12. 12.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  13. 13.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  14. 14.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  15. 15.A water tank holds 1400 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹380. It goes up by 10%. What is the new price (in ₹)?
  17. 17.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.A town has 2820 people. Its population grows by 10%. How many people live there now?
  19. 19.The price of a bicycle is ₹800. It goes up by 5%. What is the new price (in ₹)?
  20. 20.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  21. 21.A water tank holds 3240 litres. 15% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹1160 to ₹1392. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹960 to ₹1008. By what percent did it go up?
  24. 24.A water tank holds 4620 litres. 15% of the water is used. How many litres are left?
  25. 25.A water tank holds 3960 litres. 10% of the water is used. How many litres are left?
  26. 26.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  27. 27.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  28. 28.The price of a bicycle is ₹1140. It goes up by 50%. What is the new price (in ₹)?
  29. 29.A water tank holds 4300 litres. 50% of the water is used. How many litres are left?
  30. 30.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  31. 31.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 4720 litres. 5% of the water is used. How many litres are left?
  33. 33.A town has 4240 people. Its population grows by 30%. How many people live there now?
  34. 34.A water tank holds 4680 litres. 15% of the water is used. How many litres are left?
  35. 35.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 2880 litres. 25% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹4260 to ₹4047. By what percent did it come down?
  38. 38.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  39. 39.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹100 to ₹80. By what percent did it come down?

Answer key

  1. 3401
  2. 4080
  3. 48
  4. 54
  5. 28.75
  6. 552
  7. 1387
  8. 50
  9. 15
  10. 3696
  11. 50
  12. 32.5
  13. 37.5
  14. 47
  15. 1330
  16. 418
  17. 36.5
  18. 3102
  19. 840
  20. 52.5
  21. 2754
  22. 20
  23. 5
  24. 3927
  25. 3564
  26. 82
  27. 20.75
  28. 1710
  29. 2150
  30. 46
  31. 50
  32. 4484
  33. 5512
  34. 3978
  35. 44
  36. 2160
  37. 5
  38. 12.5
  39. 43.75
  40. 20

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