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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 911 · 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.The price of a school bag changes from ₹780 to ₹702. By what percent did it come down?
  2. 2.A water tank holds 3280 litres. 40% of the water is used. How many litres are left?
  3. 3.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  4. 4.A town has 1580 people. Its population grows by 10%. How many people live there now?
  5. 5.The price of a school bag changes from ₹760 to ₹570. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹180 to ₹198. By what percent did it go up?
  7. 7.A water tank holds 4020 litres. 10% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1860 to ₹1302. By what percent did it come down?
  9. 9.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.A town has 320 people. Its population grows by 30%. How many people live there now?
  12. 12.The price of a school bag changes from ₹360 to ₹180. By what percent did it come down?
  13. 13.A town has 1040 people. Its population grows by 30%. How many people live there now?
  14. 14.A town has 2880 people. Its population grows by 25%. How many people live there now?
  15. 15.A town has 2860 people. Its population grows by 30%. How many people live there now?
  16. 16.A town has 3760 people. Its population grows by 5%. How many people live there now?
  17. 17.A water tank holds 620 litres. 10% of the water is used. How many litres are left?
  18. 18.A water tank holds 520 litres. 50% of the water is used. How many litres are left?
  19. 19.A town has 1280 people. Its population grows by 40%. How many people live there now?
  20. 20.A water tank holds 3500 litres. 30% of the water is used. How many litres are left?
  21. 21.A water tank holds 4060 litres. 15% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹2560 to ₹2816. By what percent did it go up?
  23. 23.The price of a bicycle is ₹1300. It goes up by 30%. What is the new price (in ₹)?
  24. 24.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹2020 to ₹1010. By what percent did it come down?
  26. 26.A water tank holds 3600 litres. 5% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹3040. It goes up by 5%. What is the new price (in ₹)?
  28. 28.A water tank holds 2040 litres. 30% of the water is used. How many litres are left?
  29. 29.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  30. 30.The price of a bicycle is ₹780. It goes up by 25%. What is the new price (in ₹)?
  31. 31.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹1420 to ₹710. By what percent did it come down?
  33. 33.A town has 2640 people. Its population grows by 50%. How many people live there now?
  34. 34.The price of a bicycle is ₹2520. It goes up by 15%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹4760 to ₹4522. By what percent did it come down?
  36. 36.A water tank holds 2060 litres. 25% of the water is used. How many litres are left?
  37. 37.A town has 1740 people. Its population grows by 40%. How many people live there now?
  38. 38.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  39. 39.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  40. 40.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =

Answer key

  1. 10
  2. 1968
  3. 47.5
  4. 1738
  5. 25
  6. 10
  7. 3618
  8. 30
  9. 26.5
  10. 125
  11. 416
  12. 50
  13. 1352
  14. 3600
  15. 3718
  16. 3948
  17. 558
  18. 260
  19. 1792
  20. 2450
  21. 3451
  22. 10
  23. 1690
  24. 33.5
  25. 50
  26. 3420
  27. 3192
  28. 1428
  29. 36
  30. 975
  31. 57.5
  32. 50
  33. 3960
  34. 2898
  35. 5
  36. 1545
  37. 2436
  38. 80
  39. 46
  40. 68

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