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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 766 · 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 1860 people. Its population grows by 25%. How many people live there now?
  2. 2.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹1140 to ₹684. By what percent did it come down?
  4. 4.The price of a school bag changes from ₹2960 to ₹2072. By what percent did it come down?
  5. 5.The price of a school bag changes from ₹4760 to ₹3332. By what percent did it come down?
  6. 6.A water tank holds 4840 litres. 30% of the water is used. How many litres are left?
  7. 7.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  8. 8.The price of a bicycle is ₹3100. It goes up by 30%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹3540 to ₹4071. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹2620 to ₹1834. By what percent did it come down?
  11. 11.A town has 2780 people. Its population grows by 5%. How many people live there now?
  12. 12.The price of a school bag changes from ₹1940 to ₹970. By what percent did it come down?
  13. 13.A water tank holds 720 litres. 25% of the water is used. How many litres are left?
  14. 14.The price of a bicycle is ₹1200. It goes up by 5%. What is the new price (in ₹)?
  15. 15.A shop sells 4300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  16. 16.A town has 3040 people. Its population grows by 40%. How many people live there now?
  17. 17.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹1980. It goes up by 20%. What is the new price (in ₹)?
  19. 19.A water tank holds 2780 litres. 15% of the water is used. How many litres are left?
  20. 20.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  21. 21.The price of a school bag changes from ₹4000 to ₹3800. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹4180 to ₹3762. By what percent did it come down?
  23. 23.A water tank holds 2560 litres. 30% of the water is used. How many litres are left?
  24. 24.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  25. 25.The price of a bicycle is ₹140. It goes up by 20%. What is the new price (in ₹)?
  26. 26.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹3920 to ₹4116. By what percent did it go up?
  28. 28.The price of a school bag changes from ₹3960 to ₹2772. By what percent did it come down?
  29. 29.The price of a bicycle is ₹340. It goes up by 30%. What is the new price (in ₹)?
  30. 30.A water tank holds 2160 litres. 30% of the water is used. How many litres are left?
  31. 31.A shop sells 2080 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  32. 32.A water tank holds 2500 litres. 25% of the water is used. How many litres are left?
  33. 33.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  34. 34.A water tank holds 4980 litres. 40% of the water is used. How many litres are left?
  35. 35.A water tank holds 2540 litres. 25% of the water is used. How many litres are left?
  36. 36.A town has 4740 people. Its population grows by 10%. How many people live there now?
  37. 37.A shop sells 4920 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  38. 38.The price of a school bag changes from ₹3860 to ₹3474. By what percent did it come down?
  39. 39.A water tank holds 1040 litres. 20% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹1800. It goes up by 5%. What is the new price (in ₹)?

Answer key

  1. 2325
  2. 9.75
  3. 40
  4. 30
  5. 30
  6. 3388
  7. 52.5
  8. 4030
  9. 15
  10. 30
  11. 2919
  12. 50
  13. 540
  14. 1260
  15. 5590
  16. 4256
  17. 82
  18. 2376
  19. 2363
  20. 24
  21. 5
  22. 10
  23. 1792
  24. 19.25
  25. 168
  26. 61
  27. 5
  28. 30
  29. 442
  30. 1512
  31. 2704
  32. 1875
  33. 19
  34. 2988
  35. 1905
  36. 5214
  37. 6396
  38. 10
  39. 832
  40. 1890

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