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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 511 · 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.The price of a school bag changes from ₹320 to ₹304. By what percent did it come down?
  2. 2.A water tank holds 680 litres. 5% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2180 to ₹3052. By what percent did it go up?
  4. 4.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹1680 to ₹1512. By what percent did it come down?
  6. 6.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹3020 to ₹3926. By what percent did it go up?
  8. 8.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  9. 9.A water tank holds 820 litres. 50% of the water is used. How many litres are left?
  10. 10.A water tank holds 2620 litres. 15% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹260. It goes up by 5%. What is the new price (in ₹)?
  12. 12.A town has 4020 people. Its population grows by 10%. How many people live there now?
  13. 13.A water tank holds 2280 litres. 10% of the water is used. How many litres are left?
  14. 14.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹1520. It goes up by 5%. What is the new price (in ₹)?
  16. 16.The price of a bicycle is ₹4520. It goes up by 30%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹3960. It goes up by 20%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹4180 to ₹4598. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹360 to ₹180. By what percent did it come down?
  20. 20.A water tank holds 2480 litres. 5% of the water is used. How many litres are left?
  21. 21.A town has 3560 people. Its population grows by 10%. How many people live there now?
  22. 22.The price of a bicycle is ₹2600. It goes up by 40%. What is the new price (in ₹)?
  23. 23.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  24. 24.The price of a bicycle is ₹4140. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A water tank holds 2960 litres. 25% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹2440 to ₹1220. By what percent did it come down?
  27. 27.The price of a bicycle is ₹500. It goes up by 40%. What is the new price (in ₹)?
  28. 28.A town has 260 people. Its population grows by 40%. How many people live there now?
  29. 29.A water tank holds 360 litres. 10% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹1620. It goes up by 25%. What is the new price (in ₹)?
  31. 31.A town has 1780 people. Its population grows by 30%. How many people live there now?
  32. 32.The price of a school bag changes from ₹2180 to ₹1744. By what percent did it come down?
  33. 33.A water tank holds 2280 litres. 15% of the water is used. How many litres are left?
  34. 34.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  35. 35.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.The price of a bicycle is ₹2380. It goes up by 5%. What is the new price (in ₹)?
  37. 37.A water tank holds 900 litres. 25% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹2860 to ₹3146. By what percent did it go up?
  39. 39.A town has 2220 people. Its population grows by 5%. How many people live there now?
  40. 40.A town has 640 people. Its population grows by 20%. How many people live there now?

Answer key

  1. 5
  2. 646
  3. 40
  4. 61
  5. 10
  6. 20
  7. 30
  8. 14.5
  9. 410
  10. 2227
  11. 273
  12. 4422
  13. 2052
  14. 37.5
  15. 1596
  16. 5876
  17. 4752
  18. 10
  19. 50
  20. 2356
  21. 3916
  22. 3640
  23. 19
  24. 4554
  25. 2220
  26. 50
  27. 700
  28. 364
  29. 324
  30. 2025
  31. 2314
  32. 20
  33. 1938
  34. 35
  35. 49
  36. 2499
  37. 675
  38. 10
  39. 2331
  40. 768

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