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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 823 · 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 1840 people. Its population grows by 50%. How many people live there now?
  2. 2.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  3. 3.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  4. 4.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  5. 5.A water tank holds 700 litres. 20% of the water is used. How many litres are left?
  6. 6.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  7. 7.A shop sells 540 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  8. 8.The price of a bicycle is ₹3160. It goes up by 30%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹980 to ₹1470. By what percent did it go up?
  10. 10.A town has 4280 people. Its population grows by 25%. How many people live there now?
  11. 11.The price of a school bag changes from ₹4900 to ₹5390. By what percent did it go up?
  12. 12.A town has 140 people. Its population grows by 50%. How many people live there now?
  13. 13.The price of a school bag changes from ₹580 to ₹812. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹2880 to ₹3312. By what percent did it go up?
  15. 15.A water tank holds 4860 litres. 40% of the water is used. How many litres are left?
  16. 16.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹1880 to ₹1128. By what percent did it come down?
  18. 18.A water tank holds 1740 litres. 10% of the water is used. How many litres are left?
  19. 19.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  20. 20.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  21. 21.A town has 1120 people. Its population grows by 50%. How many people live there now?
  22. 22.The price of a school bag changes from ₹2760 to ₹2484. By what percent did it come down?
  23. 23.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  24. 24.The price of a bicycle is ₹120. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹600 to ₹660. By what percent did it go up?
  27. 27.A water tank holds 3840 litres. 50% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹2720. It goes up by 30%. What is the new price (in ₹)?
  29. 29.A shop sells 3640 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  30. 30.A shop sells 1960 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  31. 31.A town has 4840 people. Its population grows by 40%. How many people live there now?
  32. 32.The price of a school bag changes from ₹240 to ₹180. By what percent did it come down?
  33. 33.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹1220. It goes up by 30%. What is the new price (in ₹)?
  35. 35.A water tank holds 4140 litres. 10% of the water is used. How many litres are left?
  36. 36.A water tank holds 620 litres. 15% of the water is used. How many litres are left?
  37. 37.A water tank holds 360 litres. 15% of the water is used. How many litres are left?
  38. 38.A water tank holds 400 litres. 15% of the water is used. How many litres are left?
  39. 39.A water tank holds 4480 litres. 5% of the water is used. How many litres are left?
  40. 40.A water tank holds 4760 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 2760
  2. 37
  3. 47.5
  4. 9.25
  5. 560
  6. 28.75
  7. 594
  8. 4108
  9. 50
  10. 5350
  11. 10
  12. 210
  13. 40
  14. 15
  15. 2916
  16. 14.5
  17. 40
  18. 1566
  19. 95
  20. 43.75
  21. 1680
  22. 10
  23. 96
  24. 132
  25. 49.5
  26. 10
  27. 1920
  28. 3536
  29. 4732
  30. 2352
  31. 6776
  32. 25
  33. 87.5
  34. 1586
  35. 3726
  36. 527
  37. 306
  38. 340
  39. 4256
  40. 4522

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