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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 715 · 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 price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  2. 2.The price of a school bag changes from ₹3720 to ₹3348. By what percent did it come down?
  3. 3.A water tank holds 3080 litres. 10% of the water is used. How many litres are left?
  4. 4.A water tank holds 1280 litres. 10% of the water is used. How many litres are left?
  5. 5.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹2140 to ₹1284. By what percent did it come down?
  7. 7.A water tank holds 860 litres. 30% of the water is used. How many litres are left?
  8. 8.A town has 4040 people. Its population grows by 25%. How many people live there now?
  9. 9.A water tank holds 3200 litres. 5% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1200 to ₹1260. By what percent did it go up?
  11. 11.The price of a bicycle is ₹840. It goes up by 30%. What is the new price (in ₹)?
  12. 12.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  13. 13.The price of a school bag changes from ₹400 to ₹360. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹2000 to ₹3000. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹2200 to ₹2750. By what percent did it go up?
  16. 16.A water tank holds 2620 litres. 40% of the water is used. How many litres are left?
  17. 17.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  18. 18.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  19. 19.A water tank holds 2140 litres. 20% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹1220 to ₹610. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹680 to ₹612. By what percent did it come down?
  22. 22.A water tank holds 1100 litres. 15% of the water is used. How many litres are left?
  23. 23.A water tank holds 480 litres. 10% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹140 to ₹175. By what percent did it go up?
  25. 25.A shop sells 3100 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹3780 to ₹1890. By what percent did it come down?
  27. 27.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  28. 28.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 2900 litres. 15% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹220. It goes up by 15%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹4040 to ₹2828. By what percent did it come down?
  32. 32.A water tank holds 3780 litres. 40% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹2360. It goes up by 30%. What is the new price (in ₹)?
  34. 34.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  35. 35.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 2680 litres. 10% of the water is used. How many litres are left?
  37. 37.A water tank holds 2720 litres. 30% of the water is used. How many litres are left?
  38. 38.A water tank holds 4820 litres. 20% of the water is used. How many litres are left?
  39. 39.A water tank holds 2680 litres. 40% of the water is used. How many litres are left?
  40. 40.A shop sells 320 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?

Answer key

  1. 9.75
  2. 10
  3. 2772
  4. 1152
  5. 65
  6. 40
  7. 602
  8. 5050
  9. 3040
  10. 5
  11. 1092
  12. 52.5
  13. 10
  14. 50
  15. 25
  16. 1572
  17. 61
  18. 31.25
  19. 1712
  20. 50
  21. 10
  22. 935
  23. 432
  24. 25
  25. 3565
  26. 50
  27. 75
  28. 15.5
  29. 2465
  30. 253
  31. 30
  32. 2268
  33. 3068
  34. 95
  35. 125
  36. 2412
  37. 1904
  38. 3856
  39. 1608
  40. 336

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