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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 39 · 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 ₹400 to ₹460. By what percent did it go up?
  2. 2.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹1820 to ₹1456. By what percent did it come down?
  4. 4.A shop sells 2980 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹540 to ₹270. By what percent did it come down?
  6. 6.The price of a bicycle is ₹3900. It goes up by 10%. What is the new price (in ₹)?
  7. 7.A water tank holds 2180 litres. 15% of the water is used. How many litres are left?
  8. 8.A shop sells 280 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  10. 10.A town has 1980 people. Its population grows by 15%. How many people live there now?
  11. 11.A water tank holds 2500 litres. 20% of the water is used. How many litres are left?
  12. 12.A water tank holds 340 litres. 30% of the water is used. How many litres are left?
  13. 13.A water tank holds 3720 litres. 40% of the water is used. How many litres are left?
  14. 14.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  15. 15.A town has 2800 people. Its population grows by 30%. How many people live there now?
  16. 16.The price of a school bag changes from ₹3780 to ₹4536. By what percent did it go up?
  17. 17.A water tank holds 2480 litres. 20% of the water is used. How many litres are left?
  18. 18.A shop sells 2800 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  19. 19.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  20. 20.A water tank holds 4520 litres. 25% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹820. It goes up by 20%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹800 to ₹840. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹720 to ₹900. By what percent did it go up?
  24. 24.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹3660. It goes up by 10%. What is the new price (in ₹)?
  26. 26.The price of a bicycle is ₹2480. It goes up by 5%. What is the new price (in ₹)?
  27. 27.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  28. 28.The price of a school bag changes from ₹120 to ₹168. By what percent did it go up?
  29. 29.A water tank holds 1120 litres. 20% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1700 to ₹1275. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹3580 to ₹2148. By what percent did it come down?
  32. 32.A water tank holds 320 litres. 5% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹4100 to ₹3485. By what percent did it come down?
  34. 34.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  35. 35.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  36. 36.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  37. 37.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 2900 litres. 15% of the water is used. How many litres are left?
  39. 39.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  40. 40.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =

Answer key

  1. 15
  2. 72.5
  3. 20
  4. 4172
  5. 50
  6. 4290
  7. 1853
  8. 392
  9. 43.75
  10. 2277
  11. 2000
  12. 238
  13. 2232
  14. 49.5
  15. 3640
  16. 20
  17. 1984
  18. 4200
  19. 19
  20. 3390
  21. 984
  22. 5
  23. 25
  24. 12.5
  25. 4026
  26. 2604
  27. 65
  28. 40
  29. 896
  30. 25
  31. 40
  32. 304
  33. 15
  34. 61
  35. 32.25
  36. 56
  37. 15.5
  38. 2465
  39. 57.5
  40. 57.5

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