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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 873 · 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 5% and then comes down by 5% more. By what percent has it come down in all? =
  2. 2.The price of a school bag changes from ₹2380 to ₹2499. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹3340 to ₹3674. By what percent did it go up?
  4. 4.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  5. 5.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  6. 6.A town has 3560 people. Its population grows by 25%. How many people live there now?
  7. 7.A water tank holds 3280 litres. 40% of the water is used. How many litres are left?
  8. 8.A water tank holds 2320 litres. 40% of the water is used. How many litres are left?
  9. 9.A water tank holds 4540 litres. 20% of the water is used. How many litres are left?
  10. 10.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  12. 12.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  13. 13.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  14. 14.A town has 440 people. Its population grows by 10%. How many people live there now?
  15. 15.A water tank holds 900 litres. 15% of the water is used. How many litres are left?
  16. 16.A water tank holds 1840 litres. 25% of the water is used. How many litres are left?
  17. 17.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹2360. It goes up by 50%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹2040 to ₹2346. By what percent did it go up?
  20. 20.The price of a bicycle is ₹3240. It goes up by 10%. What is the new price (in ₹)?
  21. 21.The price of a school bag changes from ₹1260 to ₹1764. By what percent did it go up?
  22. 22.A water tank holds 3100 litres. 40% of the water is used. How many litres are left?
  23. 23.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  24. 24.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹2720 to ₹1904. By what percent did it come down?
  26. 26.A water tank holds 600 litres. 20% of the water is used. How many litres are left?
  27. 27.A water tank holds 4240 litres. 15% of the water is used. How many litres are left?
  28. 28.A water tank holds 2160 litres. 10% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹4300 to ₹6020. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹2460 to ₹2829. By what percent did it go up?
  31. 31.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.The price of a bicycle is ₹860. It goes up by 10%. What is the new price (in ₹)?
  33. 33.The price of a bicycle is ₹340. It goes up by 10%. What is the new price (in ₹)?
  34. 34.A water tank holds 4120 litres. 50% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹2220 to ₹1887. By what percent did it come down?
  36. 36.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  37. 37.A water tank holds 1680 litres. 20% of the water is used. How many litres are left?
  38. 38.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  39. 39.A water tank holds 4480 litres. 15% of the water is used. How many litres are left?
  40. 40.A water tank holds 780 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 9.75
  2. 5
  3. 10
  4. 28.75
  5. 37.5
  6. 4450
  7. 1968
  8. 1392
  9. 3632
  10. 87.5
  11. 62.5
  12. 28
  13. 62.5
  14. 484
  15. 765
  16. 1380
  17. 26.5
  18. 3540
  19. 15
  20. 3564
  21. 40
  22. 1860
  23. 65
  24. 35
  25. 30
  26. 480
  27. 3604
  28. 1944
  29. 40
  30. 15
  31. 28.75
  32. 946
  33. 374
  34. 2060
  35. 15
  36. 52
  37. 1344
  38. 49
  39. 3808
  40. 741

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