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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 729 · 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 460 litres. 25% of the water is used. How many litres are left?
  2. 2.A water tank holds 1460 litres. 5% of the water is used. How many litres are left?
  3. 3.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  4. 4.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  5. 5.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹1560 to ₹1638. By what percent did it go up?
  7. 7.A water tank holds 1880 litres. 20% of the water is used. How many litres are left?
  8. 8.A water tank holds 4760 litres. 25% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹2020 to ₹3030. By what percent did it go up?
  10. 10.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  11. 11.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹3360 to ₹2016. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹3700 to ₹2590. By what percent did it come down?
  14. 14.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  15. 15.The price of a bicycle is ₹4660. It goes up by 50%. What is the new price (in ₹)?
  16. 16.A water tank holds 5000 litres. 20% of the water is used. How many litres are left?
  17. 17.A water tank holds 3080 litres. 20% of the water is used. How many litres are left?
  18. 18.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  19. 19.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  20. 20.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 4180 litres. 5% of the water is used. How many litres are left?
  23. 23.A shop sells 80 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  24. 24.A town has 1560 people. Its population grows by 20%. How many people live there now?
  25. 25.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹980. It goes up by 10%. What is the new price (in ₹)?
  27. 27.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  28. 28.The price of a bicycle is ₹2320. It goes up by 15%. What is the new price (in ₹)?
  29. 29.A town has 420 people. Its population grows by 50%. How many people live there now?
  30. 30.A water tank holds 3780 litres. 20% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹4540 to ₹4313. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹3180 to ₹2385. By what percent did it come down?
  33. 33.A water tank holds 2700 litres. 15% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹3100 to ₹2325. By what percent did it come down?
  35. 35.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  36. 36.The price of a bicycle is ₹4580. It goes up by 30%. What is the new price (in ₹)?
  37. 37.A shop sells 1920 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  38. 38.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  39. 39.A water tank holds 3040 litres. 40% of the water is used. How many litres are left?
  40. 40.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =

Answer key

  1. 345
  2. 1387
  3. 14
  4. 37
  5. 55
  6. 5
  7. 1504
  8. 3570
  9. 50
  10. 65
  11. 14.5
  12. 40
  13. 30
  14. 9.75
  15. 6990
  16. 4000
  17. 2464
  18. 10.5
  19. 31.25
  20. 38
  21. 68
  22. 3971
  23. 88
  24. 1872
  25. 61
  26. 1078
  27. 19.25
  28. 2668
  29. 630
  30. 3024
  31. 5
  32. 25
  33. 2295
  34. 25
  35. 47
  36. 5954
  37. 2112
  38. 33.5
  39. 1824
  40. 5

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