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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 279 · 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 1500 litres. 15% of the water is used. How many litres are left?
  2. 2.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹3800 to ₹4560. By what percent did it go up?
  4. 4.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  5. 5.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹2840 to ₹2556. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹1040 to ₹624. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹1940 to ₹2425. By what percent did it go up?
  9. 9.A water tank holds 4780 litres. 50% of the water is used. How many litres are left?
  10. 10.A water tank holds 60 litres. 10% of the water is used. How many litres are left?
  11. 11.A shop sells 3380 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  12. 12.The price of a school bag changes from ₹4080 to ₹5712. By what percent did it go up?
  13. 13.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  14. 14.A water tank holds 720 litres. 25% of the water is used. How many litres are left?
  15. 15.A town has 3640 people. Its population grows by 5%. How many people live there now?
  16. 16.A water tank holds 780 litres. 15% of the water is used. How many litres are left?
  17. 17.A town has 3880 people. Its population grows by 5%. How many people live there now?
  18. 18.The price of a school bag changes from ₹3700 to ₹4810. By what percent did it go up?
  19. 19.A town has 4380 people. Its population grows by 50%. How many people live there now?
  20. 20.A water tank holds 2520 litres. 30% of the water is used. How many litres are left?
  21. 21.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹2620 to ₹2751. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹2420 to ₹2904. By what percent did it go up?
  24. 24.A water tank holds 2400 litres. 15% of the water is used. How many litres are left?
  25. 25.A water tank holds 4120 litres. 20% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹1980 to ₹2574. By what percent did it go up?
  27. 27.A water tank holds 540 litres. 30% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹700. It goes up by 5%. What is the new price (in ₹)?
  29. 29.A shop sells 940 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  30. 30.A shop sells 2700 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  31. 31.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  33. 33.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 1100 litres. 40% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹2260. It goes up by 10%. What is the new price (in ₹)?
  36. 36.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  37. 37.A water tank holds 1400 litres. 25% of the water is used. How many litres are left?
  38. 38.A water tank holds 720 litres. 30% of the water is used. How many litres are left?
  39. 39.A town has 3700 people. Its population grows by 15%. How many people live there now?
  40. 40.A water tank holds 2280 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 1275
  2. 75
  3. 20
  4. 72.5
  5. 68
  6. 10
  7. 40
  8. 25
  9. 2390
  10. 54
  11. 3549
  12. 40
  13. 23.5
  14. 540
  15. 3822
  16. 663
  17. 4074
  18. 30
  19. 6570
  20. 1764
  21. 40
  22. 5
  23. 20
  24. 2040
  25. 3296
  26. 30
  27. 378
  28. 735
  29. 1128
  30. 3240
  31. 9.75
  32. 80
  33. 50
  34. 660
  35. 2486
  36. 70
  37. 1050
  38. 504
  39. 4255
  40. 1824

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