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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 280 · 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 760 litres. 5% of the water is used. How many litres are left?
  2. 2.A shop sells 60 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.A town has 5000 people. Its population grows by 30%. How many people live there now?
  4. 4.A water tank holds 260 litres. 25% of the water is used. How many litres are left?
  5. 5.A water tank holds 720 litres. 50% of the water is used. How many litres are left?
  6. 6.A water tank holds 860 litres. 5% of the water is used. How many litres are left?
  7. 7.A town has 4120 people. Its population grows by 40%. How many people live there now?
  8. 8.The price of a bicycle is ₹4040. It goes up by 15%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹3920 to ₹4312. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹2340 to ₹1755. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹3620 to ₹4163. By what percent did it go up?
  12. 12.A town has 1140 people. Its population grows by 50%. How many people live there now?
  13. 13.The price of a school bag changes from ₹4740 to ₹6636. By what percent did it go up?
  14. 14.A town has 2900 people. Its population grows by 50%. How many people live there now?
  15. 15.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  16. 16.The price of a school bag changes from ₹3660 to ₹2196. By what percent did it come down?
  17. 17.A water tank holds 460 litres. 50% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹2880 to ₹4032. By what percent did it go up?
  19. 19.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  20. 20.A water tank holds 2040 litres. 50% of the water is used. How many litres are left?
  21. 21.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹2360 to ₹3068. By what percent did it go up?
  23. 23.The price of a bicycle is ₹700. It goes up by 10%. What is the new price (in ₹)?
  24. 24.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  25. 25.A water tank holds 1340 litres. 20% of the water is used. How many litres are left?
  26. 26.A water tank holds 1580 litres. 50% of the water is used. How many litres are left?
  27. 27.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  28. 28.A town has 2260 people. Its population grows by 20%. How many people live there now?
  29. 29.The price of a school bag changes from ₹3060 to ₹2142. By what percent did it come down?
  30. 30.A shop sells 1140 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  31. 31.A water tank holds 4540 litres. 10% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹3260 to ₹3423. By what percent did it go up?
  33. 33.A water tank holds 3560 litres. 5% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹4040. It goes up by 10%. What is the new price (in ₹)?
  35. 35.A water tank holds 2380 litres. 20% of the water is used. How many litres are left?
  36. 36.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  37. 37.A water tank holds 2200 litres. 20% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹1880. It goes up by 10%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹3920 to ₹4900. By what percent did it go up?
  40. 40.A water tank holds 3340 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 722
  2. 63
  3. 6500
  4. 195
  5. 360
  6. 817
  7. 5768
  8. 4646
  9. 10
  10. 25
  11. 15
  12. 1710
  13. 40
  14. 4350
  15. 27.75
  16. 40
  17. 230
  18. 40
  19. 64
  20. 1020
  21. 80
  22. 30
  23. 770
  24. 36.25
  25. 1072
  26. 790
  27. 19
  28. 2712
  29. 30
  30. 1197
  31. 4086
  32. 5
  33. 3382
  34. 4444
  35. 1904
  36. 40.5
  37. 1760
  38. 2068
  39. 25
  40. 2505

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