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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 44 · 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.

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  1. 1.A water tank holds 1020 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹560. It goes up by 30%. What is the new price (in ₹)?
  3. 3.A town has 460 people. Its population grows by 15%. How many people live there now?
  4. 4.A shop sells 2300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹920 to ₹1012. By what percent did it go up?
  6. 6.A shop sells 1060 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  7. 7.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.A shop sells 2580 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  9. 9.A water tank holds 4780 litres. 20% of the water is used. How many litres are left?
  10. 10.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  11. 11.The price of a bicycle is ₹3000. It goes up by 30%. What is the new price (in ₹)?
  12. 12.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  13. 13.A town has 3080 people. Its population grows by 20%. How many people live there now?
  14. 14.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹960. It goes up by 10%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹1260 to ₹1323. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹2900 to ₹1450. By what percent did it come down?
  18. 18.A shop sells 2140 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  19. 19.A water tank holds 1580 litres. 30% of the water is used. How many litres are left?
  20. 20.A water tank holds 4600 litres. 40% of the water is used. How many litres are left?
  21. 21.A water tank holds 3360 litres. 25% of the water is used. How many litres are left?
  22. 22.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  23. 23.A town has 2300 people. Its population grows by 20%. How many people live there now?
  24. 24.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹1120 to ₹952. By what percent did it come down?
  26. 26.A water tank holds 1380 litres. 20% of the water is used. How many litres are left?
  27. 27.A water tank holds 3660 litres. 15% of the water is used. How many litres are left?
  28. 28.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.The price of a bicycle is ₹2320. It goes up by 40%. What is the new price (in ₹)?
  30. 30.A town has 460 people. Its population grows by 30%. How many people live there now?
  31. 31.The price of a bicycle is ₹3720. It goes up by 5%. What is the new price (in ₹)?
  32. 32.A town has 1340 people. Its population grows by 25%. How many people live there now?
  33. 33.A water tank holds 3380 litres. 20% of the water is used. How many litres are left?
  34. 34.A water tank holds 2600 litres. 40% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹2740. It goes up by 20%. What is the new price (in ₹)?
  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 town has 540 people. Its population grows by 40%. How many people live there now?
  38. 38.The price of a school bag changes from ₹2480 to ₹2604. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹3560 to ₹3916. By what percent did it go up?
  40. 40.The price of a school bag changes from ₹740 to ₹851. By what percent did it go up?

Answer key

  1. 816
  2. 728
  3. 529
  4. 2990
  5. 10
  6. 1113
  7. 65
  8. 3870
  9. 3824
  10. 43.75
  11. 3900
  12. 33.5
  13. 3696
  14. 50
  15. 1056
  16. 5
  17. 50
  18. 3210
  19. 1106
  20. 2760
  21. 2520
  22. 75
  23. 2760
  24. 38
  25. 15
  26. 1104
  27. 3111
  28. 15.5
  29. 3248
  30. 598
  31. 3906
  32. 1675
  33. 2704
  34. 1560
  35. 3288
  36. 26
  37. 756
  38. 5
  39. 10
  40. 15

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