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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 944 · 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 price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  2. 2.A town has 780 people. Its population grows by 25%. How many people live there now?
  3. 3.The price of a bicycle is ₹3320. It goes up by 5%. What is the new price (in ₹)?
  4. 4.A water tank holds 4820 litres. 15% of the water is used. How many litres are left?
  5. 5.A town has 1700 people. Its population grows by 20%. How many people live there now?
  6. 6.A town has 3560 people. Its population grows by 40%. How many people live there now?
  7. 7.A shop sells 4680 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  8. 8.The price of a school bag changes from ₹4260 to ₹5538. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹2480 to ₹2232. By what percent did it come down?
  10. 10.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  11. 11.A shop sells 2240 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  12. 12.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  13. 13.The price of a school bag changes from ₹4960 to ₹6200. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹480 to ₹720. By what percent did it go up?
  15. 15.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  16. 16.A water tank holds 4200 litres. 40% of the water is used. How many litres are left?
  17. 17.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  18. 18.A water tank holds 960 litres. 25% of the water is used. How many litres are left?
  19. 19.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  20. 20.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  21. 21.A shop sells 4700 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  22. 22.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  23. 23.The price of a bicycle is ₹380. It goes up by 5%. What is the new price (in ₹)?
  24. 24.A water tank holds 2680 litres. 10% of the water is used. How many litres are left?
  25. 25.A water tank holds 4300 litres. 30% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹3100 to ₹4340. By what percent did it go up?
  27. 27.A water tank holds 660 litres. 20% of the water is used. How many litres are left?
  28. 28.A water tank holds 3440 litres. 50% of the water is used. How many litres are left?
  29. 29.A town has 1320 people. Its population grows by 30%. How many people live there now?
  30. 30.The price of a school bag changes from ₹540 to ₹810. By what percent did it go up?
  31. 31.A water tank holds 820 litres. 25% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹60. It goes up by 5%. What is the new price (in ₹)?
  33. 33.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹4480 to ₹3808. By what percent did it come down?
  35. 35.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  36. 36.The price of a school bag changes from ₹1700 to ₹850. By what percent did it come down?
  37. 37.The price of a school bag changes from ₹1660 to ₹1411. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹4700 to ₹5170. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹2900 to ₹2465. By what percent did it come down?
  40. 40.A water tank holds 1000 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 62.5
  2. 975
  3. 3486
  4. 4097
  5. 2040
  6. 4984
  7. 7020
  8. 30
  9. 10
  10. 21
  11. 3136
  12. 43
  13. 25
  14. 50
  15. 52.5
  16. 2520
  17. 4
  18. 720
  19. 72.5
  20. 28.75
  21. 5405
  22. 32.5
  23. 399
  24. 2412
  25. 3010
  26. 40
  27. 528
  28. 1720
  29. 1716
  30. 50
  31. 615
  32. 63
  33. 35
  34. 15
  35. 6.25
  36. 50
  37. 15
  38. 10
  39. 15
  40. 950

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