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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 592 · 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 ₹3520 to ₹2992. By what percent did it come down?
  2. 2.A water tank holds 820 litres. 30% of the water is used. How many litres are left?
  3. 3.A water tank holds 1700 litres. 15% of the water is used. How many litres are left?
  4. 4.The price of a bicycle is ₹660. It goes up by 10%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹300. It goes up by 20%. What is the new price (in ₹)?
  6. 6.A town has 3900 people. Its population grows by 15%. How many people live there now?
  7. 7.A water tank holds 260 litres. 30% of the water is used. How many litres are left?
  8. 8.The price of a bicycle is ₹4540. It goes up by 20%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹3860 to ₹4439. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹2540 to ₹3810. By what percent did it go up?
  11. 11.A town has 3080 people. Its population grows by 5%. How many people live there now?
  12. 12.A town has 1440 people. Its population grows by 20%. How many people live there now?
  13. 13.The price of a school bag changes from ₹1820 to ₹2548. By what percent did it go up?
  14. 14.The price of a bicycle is ₹1200. It goes up by 25%. What is the new price (in ₹)?
  15. 15.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  16. 16.A water tank holds 1340 litres. 50% of the water is used. How many litres are left?
  17. 17.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  18. 18.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  19. 19.The price of a bicycle is ₹660. It goes up by 40%. What is the new price (in ₹)?
  20. 20.A town has 3580 people. Its population grows by 20%. How many people live there now?
  21. 21.A water tank holds 3520 litres. 10% of the water is used. How many litres are left?
  22. 22.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 4900 litres. 25% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹3860 to ₹3281. By what percent did it come down?
  25. 25.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹1840 to ₹2024. By what percent did it go up?
  27. 27.The price of a bicycle is ₹780. It goes up by 40%. What is the new price (in ₹)?
  28. 28.A water tank holds 4360 litres. 20% of the water is used. How many litres are left?
  29. 29.A shop sells 4000 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  30. 30.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  31. 31.The price of a school bag changes from ₹3600 to ₹2160. By what percent did it come down?
  32. 32.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  33. 33.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  34. 34.A town has 660 people. Its population grows by 20%. How many people live there now?
  35. 35.The price of a school bag changes from ₹3740 to ₹1870. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹1920 to ₹2400. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹460 to ₹529. By what percent did it go up?
  38. 38.A shop sells 4340 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  39. 39.A water tank holds 1740 litres. 15% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹3220 to ₹3703. By what percent did it go up?

Answer key

  1. 15
  2. 574
  3. 1445
  4. 726
  5. 360
  6. 4485
  7. 182
  8. 5448
  9. 15
  10. 50
  11. 3234
  12. 1728
  13. 40
  14. 1500
  15. 58
  16. 670
  17. 47.5
  18. 46
  19. 924
  20. 4296
  21. 3168
  22. 72.5
  23. 3675
  24. 15
  25. 14
  26. 10
  27. 1092
  28. 3488
  29. 5000
  30. 28
  31. 40
  32. 36.25
  33. 82
  34. 792
  35. 50
  36. 25
  37. 15
  38. 4774
  39. 1479
  40. 15

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