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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 310 · 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 shop sells 140 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  2. 2.The price of a bicycle is ₹3780. It goes up by 40%. What is the new price (in ₹)?
  3. 3.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 4560 litres. 20% of the water is used. How many litres are left?
  5. 5.A water tank holds 1260 litres. 25% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹4720 to ₹4956. By what percent did it go up?
  7. 7.The price of a school bag changes from ₹3380 to ₹2704. By what percent did it come down?
  8. 8.A water tank holds 1120 litres. 30% of the water is used. How many litres are left?
  9. 9.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  10. 10.A town has 2980 people. Its population grows by 25%. How many people live there now?
  11. 11.A town has 2180 people. Its population grows by 10%. How many people live there now?
  12. 12.The price of a school bag changes from ₹2420 to ₹1815. By what percent did it come down?
  13. 13.The price of a bicycle is ₹1380. It goes up by 30%. What is the new price (in ₹)?
  14. 14.The price of a bicycle is ₹1860. It goes up by 40%. What is the new price (in ₹)?
  15. 15.A water tank holds 920 litres. 10% of the water is used. How many litres are left?
  16. 16.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  17. 17.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  18. 18.A shop sells 120 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  19. 19.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  20. 20.A water tank holds 2500 litres. 15% of the water is used. How many litres are left?
  21. 21.A water tank holds 560 litres. 20% of the water is used. How many litres are left?
  22. 22.The price of a bicycle is ₹1120. It goes up by 50%. What is the new price (in ₹)?
  23. 23.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  24. 24.The price of a bicycle is ₹3680. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A town has 3380 people. Its population grows by 40%. How many people live there now?
  26. 26.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  27. 27.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  29. 29.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  30. 30.A shop sells 1360 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  31. 31.The price of a bicycle is ₹4800. It goes up by 50%. What is the new price (in ₹)?
  32. 32.The price of a school bag changes from ₹1660 to ₹996. By what percent did it come down?
  33. 33.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  34. 34.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  35. 35.A water tank holds 1180 litres. 50% of the water is used. How many litres are left?
  36. 36.A shop sells 4480 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹1240 to ₹868. By what percent did it come down?
  38. 38.A water tank holds 1880 litres. 10% of the water is used. How many litres are left?
  39. 39.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 175
  2. 5292
  3. 37.5
  4. 3648
  5. 945
  6. 5
  7. 20
  8. 784
  9. 3.5
  10. 3725
  11. 2398
  12. 25
  13. 1794
  14. 2604
  15. 828
  16. 57.5
  17. 80
  18. 156
  19. 28.75
  20. 2125
  21. 448
  22. 1680
  23. 33.5
  24. 4048
  25. 4732
  26. 125
  27. 82
  28. 62.5
  29. 2
  30. 1632
  31. 7200
  32. 40
  33. 20.75
  34. 43
  35. 590
  36. 5376
  37. 30
  38. 1692
  39. 54
  40. 55

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