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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 896 · 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 1320 litres. 5% of the water is used. How many litres are left?
  2. 2.A shop sells 4780 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  3. 3.A town has 1620 people. Its population grows by 5%. How many people live there now?
  4. 4.The price of a school bag changes from ₹4320 to ₹4536. By what percent did it go up?
  5. 5.A water tank holds 4460 litres. 5% of the water is used. How many litres are left?
  6. 6.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 2100 litres. 50% of the water is used. How many litres are left?
  8. 8.A town has 4860 people. Its population grows by 20%. How many people live there now?
  9. 9.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  10. 10.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹3760 to ₹2632. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹980 to ₹686. By what percent did it come down?
  13. 13.A town has 660 people. Its population grows by 30%. How many people live there now?
  14. 14.A water tank holds 3360 litres. 25% of the water is used. How many litres are left?
  15. 15.A water tank holds 2160 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹2080 to ₹2912. By what percent did it go up?
  17. 17.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  18. 18.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  19. 19.A town has 3180 people. Its population grows by 10%. How many people live there now?
  20. 20.The price of a school bag changes from ₹2680 to ₹2546. By what percent did it come down?
  21. 21.The price of a bicycle is ₹2640. It goes up by 50%. What is the new price (in ₹)?
  22. 22.A town has 3220 people. Its population grows by 25%. How many people live there now?
  23. 23.A water tank holds 2360 litres. 10% of the water is used. How many litres are left?
  24. 24.A town has 60 people. Its population grows by 10%. How many people live there now?
  25. 25.A shop sells 760 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  26. 26.The price of a bicycle is ₹3700. It goes up by 10%. What is the new price (in ₹)?
  27. 27.A water tank holds 4640 litres. 10% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹2880 to ₹3168. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹4140 to ₹2898. By what percent did it come down?
  30. 30.A water tank holds 2860 litres. 5% of the water is used. How many litres are left?
  31. 31.A water tank holds 4140 litres. 5% of the water is used. How many litres are left?
  32. 32.A water tank holds 3880 litres. 10% of the water is used. How many litres are left?
  33. 33.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  34. 34.A town has 320 people. Its population grows by 25%. How many people live there now?
  35. 35.A shop sells 780 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  36. 36.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  37. 37.A town has 80 people. Its population grows by 40%. How many people live there now?
  38. 38.A water tank holds 3640 litres. 10% of the water is used. How many litres are left?
  39. 39.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 1040 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 1254
  2. 5975
  3. 1701
  4. 5
  5. 4237
  6. 54
  7. 1050
  8. 5832
  9. 82
  10. 46
  11. 30
  12. 30
  13. 858
  14. 2520
  15. 2052
  16. 40
  17. 44
  18. 36
  19. 3498
  20. 5
  21. 3960
  22. 4025
  23. 2124
  24. 66
  25. 950
  26. 4070
  27. 4176
  28. 10
  29. 30
  30. 2717
  31. 3933
  32. 3492
  33. 36.5
  34. 400
  35. 975
  36. 80
  37. 112
  38. 3276
  39. 43.75
  40. 780

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