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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 375 · 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 820 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2320 to ₹3248. By what percent did it go up?
  3. 3.A water tank holds 760 litres. 50% of the water is used. How many litres are left?
  4. 4.A water tank holds 3140 litres. 30% of the water is used. How many litres are left?
  5. 5.A water tank holds 3400 litres. 10% of the water is used. How many litres are left?
  6. 6.A town has 4300 people. Its population grows by 50%. How many people live there now?
  7. 7.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  8. 8.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  9. 9.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  10. 10.A shop sells 4140 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  11. 11.A water tank holds 3760 litres. 50% of the water is used. How many litres are left?
  12. 12.A water tank holds 2800 litres. 20% of the water is used. How many litres are left?
  13. 13.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  14. 14.The price of a bicycle is ₹2740. It goes up by 25%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹3380 to ₹5070. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹3360 to ₹2016. By what percent did it come down?
  17. 17.The price of a bicycle is ₹3140. It goes up by 20%. What is the new price (in ₹)?
  18. 18.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  19. 19.The price of a bicycle is ₹4240. It goes up by 5%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹3860 to ₹1930. By what percent did it come down?
  21. 21.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹4180 to ₹3553. By what percent did it come down?
  23. 23.The price of a bicycle is ₹1940. It goes up by 15%. What is the new price (in ₹)?
  24. 24.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  25. 25.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  26. 26.The price of a school bag changes from ₹3520 to ₹4224. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹1480 to ₹2072. By what percent did it go up?
  28. 28.The price of a school bag changes from ₹740 to ₹1036. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹4120 to ₹3914. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹2640 to ₹3036. By what percent did it go up?
  31. 31.A water tank holds 160 litres. 15% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹2160. It goes up by 30%. What is the new price (in ₹)?
  33. 33.A water tank holds 600 litres. 20% of the water is used. How many litres are left?
  34. 34.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  35. 35.The price of a school bag changes from ₹140 to ₹154. By what percent did it go up?
  36. 36.A town has 1260 people. Its population grows by 5%. How many people live there now?
  37. 37.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  38. 38.A water tank holds 3700 litres. 5% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹2060 to ₹1751. By what percent did it come down?
  40. 40.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =

Answer key

  1. 656
  2. 40
  3. 380
  4. 2198
  5. 3060
  6. 6450
  7. 62.5
  8. 57.5
  9. 55
  10. 5175
  11. 1880
  12. 2240
  13. 19.25
  14. 3425
  15. 50
  16. 40
  17. 3768
  18. 75
  19. 4452
  20. 50
  21. 46
  22. 15
  23. 2231
  24. 51
  25. 49
  26. 20
  27. 40
  28. 40
  29. 5
  30. 15
  31. 136
  32. 2808
  33. 480
  34. 9.75
  35. 10
  36. 1323
  37. 65
  38. 3515
  39. 15
  40. 26

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