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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 750 · 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 1120 litres. 5% of the water is used. How many litres are left?
  2. 2.A town has 1420 people. Its population grows by 10%. How many people live there now?
  3. 3.The price of a school bag changes from ₹300 to ₹180. By what percent did it come down?
  4. 4.A water tank holds 3640 litres. 30% of the water is used. How many litres are left?
  5. 5.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  6. 6.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  7. 7.The price of a bicycle is ₹140. It goes up by 40%. What is the new price (in ₹)?
  8. 8.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  9. 9.The price of a bicycle is ₹2980. It goes up by 15%. What is the new price (in ₹)?
  10. 10.The price of a school bag changes from ₹3260 to ₹4890. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹4400 to ₹2200. By what percent did it come down?
  12. 12.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹1140 to ₹570. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹3520 to ₹3872. By what percent did it go up?
  15. 15.A town has 2360 people. Its population grows by 20%. How many people live there now?
  16. 16.A town has 1340 people. Its population grows by 20%. How many people live there now?
  17. 17.The price of a school bag changes from ₹2180 to ₹2507. By what percent did it go up?
  18. 18.A shop sells 2220 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  19. 19.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹4980 to ₹6474. By what percent did it go up?
  21. 21.A water tank holds 1560 litres. 30% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹1220 to ₹1586. By what percent did it go up?
  23. 23.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  24. 24.A water tank holds 1260 litres. 40% of the water is used. How many litres are left?
  25. 25.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹3100 to ₹1550. By what percent did it come down?
  27. 27.A shop sells 1060 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  28. 28.A shop sells 4660 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  29. 29.A water tank holds 4080 litres. 50% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹4680 to ₹4212. By what percent did it come down?
  31. 31.A water tank holds 3960 litres. 50% of the water is used. How many litres are left?
  32. 32.A shop sells 1840 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  33. 33.A water tank holds 1440 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹3280. It goes up by 50%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹400 to ₹280. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹1040 to ₹520. By what percent did it come down?
  37. 37.The price of a school bag changes from ₹260 to ₹156. By what percent did it come down?
  38. 38.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  39. 39.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  40. 40.A water tank holds 240 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 1064
  2. 1562
  3. 40
  4. 2548
  5. 28
  6. 65
  7. 196
  8. 31.25
  9. 3427
  10. 50
  11. 50
  12. 87.5
  13. 50
  14. 10
  15. 2832
  16. 1608
  17. 15
  18. 3108
  19. 75
  20. 30
  21. 1092
  22. 30
  23. 44
  24. 756
  25. 20.75
  26. 50
  27. 1325
  28. 5825
  29. 2040
  30. 10
  31. 1980
  32. 2392
  33. 1080
  34. 4920
  35. 30
  36. 50
  37. 40
  38. 43.75
  39. 33
  40. 144

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