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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 983 · 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 price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  2. 2.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 2880 litres. 30% of the water is used. How many litres are left?
  4. 4.A water tank holds 4040 litres. 5% of the water is used. How many litres are left?
  5. 5.A town has 2200 people. Its population grows by 15%. How many people live there now?
  6. 6.The price of a bicycle is ₹4480. It goes up by 40%. What is the new price (in ₹)?
  7. 7.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  8. 8.A town has 3040 people. Its population grows by 20%. How many people live there now?
  9. 9.A water tank holds 1080 litres. 20% of the water is used. How many litres are left?
  10. 10.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  11. 11.A water tank holds 2600 litres. 40% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹280 to ₹336. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹2180 to ₹1853. By what percent did it come down?
  14. 14.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  15. 15.A water tank holds 4440 litres. 50% of the water is used. How many litres are left?
  16. 16.A water tank holds 3300 litres. 25% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3220 to ₹4830. By what percent did it go up?
  18. 18.A water tank holds 2000 litres. 25% of the water is used. How many litres are left?
  19. 19.A water tank holds 2260 litres. 40% of the water is used. How many litres are left?
  20. 20.A town has 4140 people. Its population grows by 20%. How many people live there now?
  21. 21.The price of a bicycle is ₹2520. It goes up by 15%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹1840 to ₹2208. By what percent did it go up?
  23. 23.A water tank holds 960 litres. 20% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹4060 to ₹4466. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹4420 to ₹4641. By what percent did it go up?
  26. 26.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹1280 to ₹1472. By what percent did it go up?
  28. 28.The price of a school bag changes from ₹2720 to ₹2584. By what percent did it come down?
  29. 29.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  30. 30.A water tank holds 80 litres. 40% of the water is used. How many litres are left?
  31. 31.A water tank holds 4640 litres. 10% of the water is used. How many litres are left?
  32. 32.A water tank holds 2900 litres. 15% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1220 to ₹732. By what percent did it come down?
  34. 34.A town has 3840 people. Its population grows by 30%. How many people live there now?
  35. 35.The price of a bicycle is ₹2360. It goes up by 15%. What is the new price (in ₹)?
  36. 36.A water tank holds 1260 litres. 5% of the water is used. How many litres are left?
  37. 37.A town has 780 people. Its population grows by 30%. How many people live there now?
  38. 38.The price of a bicycle is ₹2740. It goes up by 20%. What is the new price (in ₹)?
  39. 39.A water tank holds 560 litres. 50% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹2480 to ₹2728. By what percent did it go up?

Answer key

  1. 68
  2. 37.5
  3. 2016
  4. 3838
  5. 2530
  6. 6272
  7. 36.25
  8. 3648
  9. 864
  10. 49
  11. 1560
  12. 20
  13. 15
  14. 32
  15. 2220
  16. 2475
  17. 50
  18. 1500
  19. 1356
  20. 4968
  21. 2898
  22. 20
  23. 768
  24. 10
  25. 5
  26. 28
  27. 15
  28. 5
  29. 43.75
  30. 48
  31. 4176
  32. 2465
  33. 40
  34. 4992
  35. 2714
  36. 1197
  37. 1014
  38. 3288
  39. 280
  40. 10

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