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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 974 · 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 10% and then comes down by 10% more. By what percent has it come down in all? =
  2. 2.A water tank holds 200 litres. 50% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2960 to ₹2812. By what percent did it come down?
  4. 4.A water tank holds 640 litres. 5% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹4700. It goes up by 5%. What is the new price (in ₹)?
  6. 6.The price of a bicycle is ₹2900. It goes up by 30%. What is the new price (in ₹)?
  7. 7.A town has 4740 people. Its population grows by 15%. How many people live there now?
  8. 8.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  9. 9.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  10. 10.A shop sells 3940 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  11. 11.A water tank holds 1700 litres. 40% of the water is used. How many litres are left?
  12. 12.A water tank holds 140 litres. 5% of the water is used. How many litres are left?
  13. 13.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  14. 14.A town has 1520 people. Its population grows by 15%. How many people live there now?
  15. 15.The price of a school bag changes from ₹2080 to ₹2704. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹3980 to ₹3184. By what percent did it come down?
  17. 17.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹3880. It goes up by 5%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹2480 to ₹1860. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹3420 to ₹2565. By what percent did it come down?
  21. 21.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 1500 litres. 30% of the water is used. How many litres are left?
  23. 23.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  24. 24.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  25. 25.A water tank holds 2740 litres. 25% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹3920 to ₹3724. By what percent did it come down?
  27. 27.The price of a school bag changes from ₹3600 to ₹3060. By what percent did it come down?
  28. 28.The price of a bicycle is ₹3820. It goes up by 10%. What is the new price (in ₹)?
  29. 29.A water tank holds 1540 litres. 20% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1800 to ₹2160. By what percent did it go up?
  31. 31.The price of a bicycle is ₹4340. It goes up by 40%. What is the new price (in ₹)?
  32. 32.A water tank holds 680 litres. 50% of the water is used. How many litres are left?
  33. 33.A water tank holds 1120 litres. 20% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹3600 to ₹4680. By what percent did it go up?
  35. 35.A shop sells 1060 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  36. 36.A water tank holds 720 litres. 15% of the water is used. How many litres are left?
  37. 37.A water tank holds 480 litres. 10% of the water is used. How many litres are left?
  38. 38.A water tank holds 2500 litres. 25% of the water is used. How many litres are left?
  39. 39.A town has 2120 people. Its population grows by 20%. How many people live there now?
  40. 40.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =

Answer key

  1. 19
  2. 100
  3. 5
  4. 608
  5. 4935
  6. 3770
  7. 5451
  8. 95
  9. 4
  10. 4137
  11. 1020
  12. 133
  13. 47.5
  14. 1748
  15. 30
  16. 20
  17. 47
  18. 4074
  19. 25
  20. 25
  21. 44
  22. 1050
  23. 54
  24. 47.5
  25. 2055
  26. 5
  27. 15
  28. 4202
  29. 1232
  30. 20
  31. 6076
  32. 340
  33. 896
  34. 30
  35. 1378
  36. 612
  37. 432
  38. 1875
  39. 2544
  40. 5

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