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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 216 · 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 bicycle is ₹4100. It goes up by 5%. What is the new price (in ₹)?
  3. 3.A water tank holds 2400 litres. 30% of the water is used. How many litres are left?
  4. 4.The price of a bicycle is ₹3120. It goes up by 10%. What is the new price (in ₹)?
  5. 5.A water tank holds 2520 litres. 30% of the water is used. How many litres are left?
  6. 6.A water tank holds 2580 litres. 5% of the water is used. How many litres are left?
  7. 7.A water tank holds 4060 litres. 5% of the water is used. How many litres are left?
  8. 8.A shop sells 3280 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  9. 9.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 30% 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 30% more. By what percent has it come down in all? =
  12. 12.A water tank holds 2340 litres. 10% of the water is used. How many litres are left?
  13. 13.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  14. 14.A town has 1340 people. Its population grows by 25%. How many people live there now?
  15. 15.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  16. 16.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  17. 17.A water tank holds 3840 litres. 15% of the water is used. How many litres are left?
  18. 18.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  19. 19.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹4560 to ₹5472. By what percent did it go up?
  21. 21.A town has 4440 people. Its population grows by 30%. How many people live there now?
  22. 22.A town has 2520 people. Its population grows by 30%. How many people live there now?
  23. 23.The price of a school bag changes from ₹3520 to ₹1760. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹2960 to ₹3552. By what percent did it go up?
  25. 25.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.A town has 2740 people. Its population grows by 15%. How many people live there now?
  27. 27.The price of a school bag changes from ₹4140 to ₹2898. By what percent did it come down?
  28. 28.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  29. 29.A water tank holds 1500 litres. 30% of the water is used. How many litres are left?
  30. 30.A town has 3620 people. Its population grows by 15%. How many people live there now?
  31. 31.The price of a school bag changes from ₹2500 to ₹2750. By what percent did it go up?
  32. 32.A shop sells 2460 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  33. 33.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹2480 to ₹1240. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹1420 to ₹2130. By what percent did it go up?
  36. 36.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 2120 litres. 30% of the water is used. How many litres are left?
  38. 38.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 3420 litres. 40% of the water is used. How many litres are left?
  40. 40.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =

Answer key

  1. 3515
  2. 4305
  3. 1680
  4. 3432
  5. 1764
  6. 2451
  7. 3857
  8. 3936
  9. 31.25
  10. 95
  11. 65
  12. 2106
  13. 110
  14. 1675
  15. 57.5
  16. 37.5
  17. 3264
  18. 15.5
  19. 50
  20. 20
  21. 5772
  22. 3276
  23. 50
  24. 20
  25. 43.75
  26. 3151
  27. 30
  28. 40
  29. 1050
  30. 4163
  31. 10
  32. 2952
  33. 87.5
  34. 50
  35. 50
  36. 26
  37. 1484
  38. 49.5
  39. 2052
  40. 62.5

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