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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 417 · 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 ₹1740 to ₹2262. By what percent did it go up?
  2. 2.A water tank holds 1640 litres. 20% of the water is used. How many litres are left?
  3. 3.A town has 1480 people. Its population grows by 20%. How many people live there now?
  4. 4.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  5. 5.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  6. 6.A water tank holds 2260 litres. 5% of the water is used. How many litres are left?
  7. 7.A water tank holds 4360 litres. 5% of the water is used. How many litres are left?
  8. 8.The price of a bicycle is ₹4200. It goes up by 30%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹3320 to ₹3486. By what percent did it go up?
  10. 10.The price of a bicycle is ₹540. It goes up by 40%. What is the new price (in ₹)?
  11. 11.A water tank holds 1580 litres. 5% of the water is used. How many litres are left?
  12. 12.A town has 1280 people. Its population grows by 10%. How many people live there now?
  13. 13.A water tank holds 3400 litres. 25% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹900 to ₹855. By what percent did it come down?
  15. 15.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  16. 16.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹3060. It goes up by 20%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹3060. It goes up by 40%. What is the new price (in ₹)?
  19. 19.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  20. 20.The price of a school bag changes from ₹180 to ₹270. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹360 to ₹324. By what percent did it come down?
  22. 22.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  23. 23.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  24. 24.The price of a school bag changes from ₹4620 to ₹5082. By what percent did it go up?
  25. 25.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  26. 26.A water tank holds 4560 litres. 50% of the water is used. How many litres are left?
  27. 27.A water tank holds 4440 litres. 5% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹4420 to ₹5746. By what percent did it go up?
  29. 29.A water tank holds 4320 litres. 40% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹4280 to ₹5136. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹2160 to ₹1080. By what percent did it come down?
  32. 32.A water tank holds 3400 litres. 50% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹4880 to ₹4148. By what percent did it come down?
  34. 34.A shop sells 4340 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  35. 35.A town has 2060 people. Its population grows by 15%. How many people live there now?
  36. 36.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹2500 to ₹2000. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹2000 to ₹1600. By what percent did it come down?
  39. 39.A town has 3020 people. Its population grows by 25%. How many people live there now?
  40. 40.The price of a bicycle is ₹720. It goes up by 50%. What is the new price (in ₹)?

Answer key

  1. 30
  2. 1312
  3. 1776
  4. 3.5
  5. 19
  6. 2147
  7. 4142
  8. 5460
  9. 5
  10. 756
  11. 1501
  12. 1408
  13. 2550
  14. 5
  15. 43.75
  16. 27.5
  17. 3672
  18. 4284
  19. 57.5
  20. 50
  21. 10
  22. 68
  23. 57.5
  24. 10
  25. 12.5
  26. 2280
  27. 4218
  28. 30
  29. 2592
  30. 20
  31. 50
  32. 1700
  33. 15
  34. 6510
  35. 2369
  36. 27.75
  37. 20
  38. 20
  39. 3775
  40. 1080

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