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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 138 · 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 1140 litres. 50% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹2880. It goes up by 20%. What is the new price (in ₹)?
  3. 3.A water tank holds 2300 litres. 25% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹840 to ₹1092. By what percent did it go up?
  5. 5.A water tank holds 1140 litres. 20% of the water is used. How many litres are left?
  6. 6.A shop sells 2160 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  7. 7.A water tank holds 2940 litres. 25% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1540 to ₹1694. By what percent did it go up?
  9. 9.A water tank holds 2940 litres. 15% of the water is used. How many litres are left?
  10. 10.A shop sells 400 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  11. 11.The price of a bicycle is ₹4160. It goes up by 15%. What is the new price (in ₹)?
  12. 12.The price of a bicycle is ₹3720. It goes up by 15%. What is the new price (in ₹)?
  13. 13.The price of a bicycle is ₹240. It goes up by 5%. What is the new price (in ₹)?
  14. 14.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  15. 15.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  16. 16.The price of a school bag changes from ₹1580 to ₹1185. By what percent did it come down?
  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 water tank holds 2480 litres. 10% of the water is used. How many litres are left?
  19. 19.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹2640 to ₹1320. By what percent did it come down?
  21. 21.A town has 1420 people. Its population grows by 5%. How many people live there now?
  22. 22.A town has 4960 people. Its population grows by 10%. How many people live there now?
  23. 23.A water tank holds 4420 litres. 20% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹220. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A water tank holds 1160 litres. 10% of the water is used. How many litres are left?
  26. 26.A shop sells 1520 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  27. 27.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  28. 28.A water tank holds 4180 litres. 10% of the water is used. How many litres are left?
  29. 29.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  30. 30.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  31. 31.The price of a school bag changes from ₹4920 to ₹4674. By what percent did it come down?
  32. 32.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  33. 33.A town has 660 people. Its population grows by 10%. How many people live there now?
  34. 34.A shop sells 400 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  35. 35.A town has 480 people. Its population grows by 10%. How many people live there now?
  36. 36.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  37. 37.A water tank holds 780 litres. 5% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹4940 to ₹4446. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹4560 to ₹5244. By what percent did it go up?
  40. 40.The price of a school bag changes from ₹4860 to ₹5589. By what percent did it go up?

Answer key

  1. 570
  2. 3456
  3. 1725
  4. 30
  5. 912
  6. 2700
  7. 2205
  8. 10
  9. 2499
  10. 480
  11. 4784
  12. 4278
  13. 252
  14. 32.25
  15. 32.5
  16. 25
  17. 80
  18. 2232
  19. 82
  20. 50
  21. 1491
  22. 5456
  23. 3536
  24. 242
  25. 1044
  26. 1672
  27. 70
  28. 3762
  29. 26.5
  30. 40
  31. 5
  32. 57.5
  33. 726
  34. 560
  35. 528
  36. 18.75
  37. 741
  38. 10
  39. 15
  40. 15

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