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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 617 · 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 4420 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2880 to ₹2736. By what percent did it come down?
  3. 3.A shop sells 3940 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  4. 4.A water tank holds 420 litres. 15% of the water is used. How many litres are left?
  5. 5.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  6. 6.A town has 2180 people. Its population grows by 15%. How many people live there now?
  7. 7.The price of a school bag changes from ₹220 to ₹165. By what percent did it come down?
  8. 8.A shop sells 1220 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  9. 9.A water tank holds 2900 litres. 20% of the water is used. How many litres are left?
  10. 10.A water tank holds 740 litres. 20% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹1860 to ₹1674. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹4360 to ₹5232. By what percent did it go up?
  13. 13.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  14. 14.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹1180. It goes up by 25%. What is the new price (in ₹)?
  16. 16.A water tank holds 4340 litres. 50% of the water is used. How many litres are left?
  17. 17.A water tank holds 280 litres. 15% of the water is used. How many litres are left?
  18. 18.A water tank holds 1360 litres. 15% of the water is used. How many litres are left?
  19. 19.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  20. 20.The price of a bicycle is ₹4980. It goes up by 50%. What is the new price (in ₹)?
  21. 21.A water tank holds 1060 litres. 50% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹1840 to ₹2576. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹260 to ₹182. By what percent did it come down?
  24. 24.The price of a bicycle is ₹1900. It goes up by 10%. What is the new price (in ₹)?
  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 price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹1420 to ₹994. By what percent did it come down?
  28. 28.A water tank holds 2520 litres. 15% of the water is used. How many litres are left?
  29. 29.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹2660 to ₹3458. By what percent did it go up?
  31. 31.A water tank holds 2080 litres. 5% of the water is used. How many litres are left?
  32. 32.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  33. 33.A shop sells 3040 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹3900 to ₹4875. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹260 to ₹299. By what percent did it go up?
  36. 36.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  37. 37.A water tank holds 4560 litres. 5% of the water is used. How many litres are left?
  38. 38.A water tank holds 4340 litres. 15% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹2740. It goes up by 50%. What is the new price (in ₹)?
  40. 40.The price of a school bag changes from ₹1040 to ₹728. By what percent did it come down?

Answer key

  1. 3757
  2. 5
  3. 4728
  4. 357
  5. 95
  6. 2507
  7. 25
  8. 1281
  9. 2320
  10. 592
  11. 10
  12. 20
  13. 96
  14. 10.25
  15. 1475
  16. 2170
  17. 238
  18. 1156
  19. 62.5
  20. 7470
  21. 530
  22. 40
  23. 30
  24. 2090
  25. 12.5
  26. 47
  27. 30
  28. 2142
  29. 50
  30. 30
  31. 1976
  32. 38
  33. 4256
  34. 25
  35. 15
  36. 36.25
  37. 4332
  38. 3689
  39. 4110
  40. 30

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