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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 246 · 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 1800 litres. 20% of the water is used. How many litres are left?
  2. 2.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  3. 3.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  4. 4.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  5. 5.The price of a bicycle is ₹1100. It goes up by 50%. What is the new price (in ₹)?
  6. 6.A water tank holds 500 litres. 40% of the water is used. How many litres are left?
  7. 7.A water tank holds 4700 litres. 30% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1720 to ₹2580. By what percent did it go up?
  9. 9.The price of a bicycle is ₹1860. It goes up by 15%. What is the new price (in ₹)?
  10. 10.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  11. 11.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  12. 12.A water tank holds 560 litres. 50% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹1220 to ₹854. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹2660 to ₹1596. By what percent did it come down?
  15. 15.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹2680 to ₹1340. By what percent did it come down?
  17. 17.A water tank holds 3820 litres. 20% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹4720. It goes up by 15%. What is the new price (in ₹)?
  19. 19.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  20. 20.A town has 880 people. Its population grows by 25%. How many people live there now?
  21. 21.The price of a bicycle is ₹2440. It goes up by 50%. What is the new price (in ₹)?
  22. 22.A town has 700 people. Its population grows by 30%. How many people live there now?
  23. 23.The price of a bicycle is ₹4880. It goes up by 25%. What is the new price (in ₹)?
  24. 24.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.A town has 420 people. Its population grows by 50%. How many people live there now?
  26. 26.A water tank holds 860 litres. 50% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹880 to ₹616. By what percent did it come down?
  28. 28.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 760 litres. 25% of the water is used. How many litres are left?
  30. 30.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹2700 to ₹4050. By what percent did it go up?
  32. 32.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  33. 33.A water tank holds 4480 litres. 10% of the water is used. How many litres are left?
  34. 34.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  35. 35.The price of a bicycle is ₹1920. It goes up by 25%. What is the new price (in ₹)?
  36. 36.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  37. 37.The price of a bicycle is ₹3200. It goes up by 40%. What is the new price (in ₹)?
  38. 38.The price of a bicycle is ₹260. It goes up by 10%. What is the new price (in ₹)?
  39. 39.A water tank holds 240 litres. 25% of the water is used. How many litres are left?
  40. 40.A water tank holds 4520 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 1440
  2. 65
  3. 26
  4. 20.75
  5. 1650
  6. 300
  7. 3290
  8. 50
  9. 2139
  10. 10.25
  11. 19
  12. 280
  13. 30
  14. 40
  15. 21
  16. 50
  17. 3056
  18. 5428
  19. 12
  20. 1100
  21. 3660
  22. 910
  23. 6100
  24. 37
  25. 630
  26. 430
  27. 30
  28. 80
  29. 570
  30. 68
  31. 50
  32. 43.75
  33. 4032
  34. 15.5
  35. 2400
  36. 75
  37. 4480
  38. 286
  39. 180
  40. 3616

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