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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 730 · 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 1000 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹2460. It goes up by 20%. What is the new price (in ₹)?
  3. 3.A water tank holds 2800 litres. 25% of the water is used. How many litres are left?
  4. 4.A shop sells 1880 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  5. 5.A shop sells 2660 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  6. 6.A water tank holds 640 litres. 50% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹4080 to ₹4692. By what percent did it go up?
  8. 8.The price of a school bag changes from ₹740 to ₹888. By what percent did it go up?
  9. 9.A town has 1680 people. Its population grows by 50%. How many people live there now?
  10. 10.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 1480 litres. 20% of the water is used. How many litres are left?
  12. 12.A water tank holds 1400 litres. 10% of the water is used. How many litres are left?
  13. 13.A water tank holds 3800 litres. 25% of the water is used. How many litres are left?
  14. 14.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  15. 15.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  16. 16.A water tank holds 1860 litres. 10% of the water is used. How many litres are left?
  17. 17.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹4480 to ₹3584. By what percent did it come down?
  19. 19.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  20. 20.A town has 3800 people. Its population grows by 50%. How many people live there now?
  21. 21.The price of a bicycle is ₹4540. It goes up by 10%. What is the new price (in ₹)?
  22. 22.A shop sells 2040 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  23. 23.A town has 260 people. Its population grows by 50%. How many people live there now?
  24. 24.The price of a school bag changes from ₹3280 to ₹2952. By what percent did it come down?
  25. 25.The price of a school bag changes from ₹1580 to ₹1817. By what percent did it go up?
  26. 26.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  27. 27.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  28. 28.A town has 1500 people. Its population grows by 15%. How many people live there now?
  29. 29.A town has 1080 people. Its population grows by 30%. How many people live there now?
  30. 30.The price of a school bag changes from ₹1120 to ₹1680. By what percent did it go up?
  31. 31.A water tank holds 4560 litres. 10% of the water is used. How many litres are left?
  32. 32.A shop sells 3360 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  33. 33.A water tank holds 3920 litres. 40% of the water is used. How many litres are left?
  34. 34.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  35. 35.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  36. 36.The price of a school bag changes from ₹1260 to ₹1071. By what percent did it come down?
  37. 37.A town has 2040 people. Its population grows by 20%. How many people live there now?
  38. 38.The price of a school bag changes from ₹2620 to ₹3406. By what percent did it go up?
  39. 39.A water tank holds 640 litres. 20% of the water is used. How many litres are left?
  40. 40.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =

Answer key

  1. 800
  2. 2952
  3. 2100
  4. 1974
  5. 3724
  6. 320
  7. 15
  8. 20
  9. 2520
  10. 20.75
  11. 1184
  12. 1260
  13. 2850
  14. 56
  15. 10.25
  16. 1674
  17. 43
  18. 20
  19. 47
  20. 5700
  21. 4994
  22. 2448
  23. 390
  24. 10
  25. 15
  26. 20
  27. 15.5
  28. 1725
  29. 1404
  30. 50
  31. 4104
  32. 3696
  33. 2352
  34. 23.5
  35. 62.5
  36. 15
  37. 2448
  38. 30
  39. 512
  40. 60

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