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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 687 · 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 3700 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹4080 to ₹4896. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹3800 to ₹3040. By what percent did it come down?
  4. 4.A water tank holds 1620 litres. 30% of the water is used. How many litres are left?
  5. 5.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  6. 6.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  7. 7.A water tank holds 300 litres. 25% of the water is used. How many litres are left?
  8. 8.A water tank holds 4600 litres. 20% of the water is used. How many litres are left?
  9. 9.A water tank holds 220 litres. 10% of the water is used. How many litres are left?
  10. 10.A town has 160 people. Its population grows by 10%. How many people live there now?
  11. 11.A town has 3260 people. Its population grows by 10%. How many people live there now?
  12. 12.A water tank holds 800 litres. 25% of the water is used. How many litres are left?
  13. 13.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹3260 to ₹3912. By what percent did it go up?
  15. 15.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  16. 16.A water tank holds 300 litres. 30% of the water is used. How many litres are left?
  17. 17.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹2880 to ₹3024. By what percent did it go up?
  19. 19.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  20. 20.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 3020 litres. 5% of the water is used. How many litres are left?
  22. 22.The price of a bicycle is ₹360. It goes up by 5%. What is the new price (in ₹)?
  23. 23.The price of a bicycle is ₹3640. It goes up by 10%. What is the new price (in ₹)?
  24. 24.A water tank holds 440 litres. 5% of the water is used. How many litres are left?
  25. 25.A shop sells 4940 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  26. 26.A water tank holds 2820 litres. 30% of the water is used. How many litres are left?
  27. 27.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  28. 28.A shop sells 1520 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹3040 to ₹2128. By what percent did it come down?
  30. 30.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  31. 31.A water tank holds 5000 litres. 5% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹1320. It goes up by 10%. What is the new price (in ₹)?
  33. 33.A water tank holds 2680 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹2400 to ₹3360. By what percent did it go up?
  35. 35.A town has 1680 people. Its population grows by 5%. How many people live there now?
  36. 36.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  37. 37.A town has 3900 people. Its population grows by 25%. How many people live there now?
  38. 38.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  39. 39.A water tank holds 920 litres. 5% of the water is used. How many litres are left?
  40. 40.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =

Answer key

  1. 3515
  2. 20
  3. 20
  4. 1134
  5. 54
  6. 19.25
  7. 225
  8. 3680
  9. 198
  10. 176
  11. 3586
  12. 600
  13. 19.25
  14. 20
  15. 43.75
  16. 210
  17. 70
  18. 5
  19. 20.75
  20. 43
  21. 2869
  22. 378
  23. 4004
  24. 418
  25. 5187
  26. 1974
  27. 50
  28. 1748
  29. 30
  30. 2
  31. 4750
  32. 1452
  33. 2010
  34. 40
  35. 1764
  36. 14.5
  37. 4875
  38. 55
  39. 874
  40. 40.5

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