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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 391 · 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 2280 litres. 25% of the water is used. How many litres are left?
  2. 2.A shop sells 3740 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  4. 4.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  5. 5.The price of a bicycle is ₹160. It goes up by 30%. What is the new price (in ₹)?
  6. 6.The price of a school bag changes from ₹4600 to ₹5750. By what percent did it go up?
  7. 7.The price of a bicycle is ₹220. It goes up by 10%. What is the new price (in ₹)?
  8. 8.A water tank holds 500 litres. 5% of the water is used. How many litres are left?
  9. 9.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.The price of a school bag changes from ₹2340 to ₹3276. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹2900 to ₹3335. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹1580 to ₹1501. By what percent did it come down?
  13. 13.A water tank holds 2380 litres. 20% of the water is used. How many litres are left?
  14. 14.A water tank holds 840 litres. 40% of the water is used. How many litres are left?
  15. 15.A water tank holds 880 litres. 50% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹3120 to ₹4680. By what percent did it go up?
  17. 17.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹460 to ₹483. By what percent did it go up?
  19. 19.The price of a bicycle is ₹1420. It goes up by 40%. What is the new price (in ₹)?
  20. 20.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹460 to ₹345. By what percent did it come down?
  22. 22.The price of a bicycle is ₹4680. It goes up by 15%. What is the new price (in ₹)?
  23. 23.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  24. 24.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  25. 25.A town has 4880 people. Its population grows by 30%. How many people live there now?
  26. 26.A town has 3560 people. Its population grows by 15%. How many people live there now?
  27. 27.A shop sells 3500 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  28. 28.A shop sells 1420 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  29. 29.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  30. 30.A water tank holds 4440 litres. 25% of the water is used. How many litres are left?
  31. 31.A water tank holds 1540 litres. 20% of the water is used. How many litres are left?
  32. 32.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  33. 33.The price of a bicycle is ₹3060. It goes up by 20%. What is the new price (in ₹)?
  34. 34.The price of a bicycle is ₹3580. It goes up by 15%. What is the new price (in ₹)?
  35. 35.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  36. 36.A water tank holds 1560 litres. 40% of the water is used. How many litres are left?
  37. 37.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  38. 38.The price of a bicycle is ₹600. It goes up by 25%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹120 to ₹102. By what percent did it come down?
  40. 40.A town has 2080 people. Its population grows by 5%. How many people live there now?

Answer key

  1. 1710
  2. 3927
  3. 10.5
  4. 24
  5. 208
  6. 25
  7. 242
  8. 475
  9. 37.5
  10. 40
  11. 15
  12. 5
  13. 1904
  14. 504
  15. 440
  16. 50
  17. 52.5
  18. 5
  19. 1988
  20. 32.25
  21. 25
  22. 5382
  23. 27.5
  24. 43
  25. 6344
  26. 4094
  27. 4025
  28. 1846
  29. 8
  30. 3330
  31. 1232
  32. 68
  33. 3672
  34. 4117
  35. 33.5
  36. 936
  37. 95
  38. 750
  39. 15
  40. 2184

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