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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 538 · 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 town has 2980 people. Its population grows by 25%. How many people live there now?
  2. 2.A water tank holds 1400 litres. 20% of the water is used. How many litres are left?
  3. 3.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  4. 4.The price of a bicycle is ₹3660. It goes up by 25%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹1340. It goes up by 25%. What is the new price (in ₹)?
  6. 6.A water tank holds 260 litres. 15% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹2420 to ₹2299. By what percent did it come down?
  8. 8.A water tank holds 720 litres. 25% of the water is used. How many litres are left?
  9. 9.A town has 740 people. Its population grows by 25%. How many people live there now?
  10. 10.A water tank holds 4300 litres. 15% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹4880 to ₹5856. By what percent did it go up?
  12. 12.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  13. 13.A town has 1600 people. Its population grows by 15%. How many people live there now?
  14. 14.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  15. 15.A water tank holds 2560 litres. 5% of the water is used. How many litres are left?
  16. 16.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  17. 17.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  18. 18.A water tank holds 400 litres. 40% of the water is used. How many litres are left?
  19. 19.A water tank holds 2860 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹3800 to ₹3230. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹4500 to ₹3825. By what percent did it come down?
  22. 22.A water tank holds 3240 litres. 5% of the water is used. How many litres are left?
  23. 23.A water tank holds 3240 litres. 30% of the water is used. How many litres are left?
  24. 24.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹900 to ₹720. By what percent did it come down?
  26. 26.The price of a bicycle is ₹4700. It goes up by 30%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹4680 to ₹5616. By what percent did it go up?
  28. 28.A water tank holds 520 litres. 30% of the water is used. How many litres are left?
  29. 29.A water tank holds 820 litres. 20% of the water is used. How many litres are left?
  30. 30.A water tank holds 4380 litres. 50% of the water is used. How many litres are left?
  31. 31.A water tank holds 4420 litres. 10% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹1900 to ₹1330. By what percent did it come down?
  33. 33.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹2440 to ₹2928. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹3360 to ₹4704. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹680 to ₹612. By what percent did it come down?
  37. 37.A water tank holds 2740 litres. 10% of the water is used. How many litres are left?
  38. 38.A shop sells 1160 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  39. 39.The price of a school bag changes from ₹4600 to ₹3450. By what percent did it come down?
  40. 40.The price of a bicycle is ₹1900. It goes up by 50%. What is the new price (in ₹)?

Answer key

  1. 3725
  2. 1120
  3. 9.25
  4. 4575
  5. 1675
  6. 221
  7. 5
  8. 540
  9. 925
  10. 3655
  11. 20
  12. 43
  13. 1840
  14. 14.5
  15. 2432
  16. 43.75
  17. 32.5
  18. 240
  19. 2002
  20. 15
  21. 15
  22. 3078
  23. 2268
  24. 62.5
  25. 20
  26. 6110
  27. 20
  28. 364
  29. 656
  30. 2190
  31. 3978
  32. 30
  33. 58
  34. 20
  35. 40
  36. 10
  37. 2466
  38. 1392
  39. 25
  40. 2850

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