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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 803 · 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 3620 people. Its population grows by 20%. How many people live there now?
  2. 2.The price of a bicycle is ₹2180. It goes up by 40%. What is the new price (in ₹)?
  3. 3.A town has 4360 people. Its population grows by 40%. How many people live there now?
  4. 4.A shop sells 640 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹1460 to ₹1825. By what percent did it go up?
  6. 6.A town has 1800 people. Its population grows by 25%. How many people live there now?
  7. 7.The price of a school bag changes from ₹1480 to ₹1776. By what percent did it go up?
  8. 8.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 3800 litres. 40% of the water is used. How many litres are left?
  10. 10.A water tank holds 860 litres. 20% of the water is used. How many litres are left?
  11. 11.A water tank holds 3100 litres. 20% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹3540 to ₹2832. By what percent did it come down?
  13. 13.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  14. 14.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  15. 15.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  16. 16.A water tank holds 3140 litres. 40% of the water is used. How many litres are left?
  17. 17.A town has 240 people. Its population grows by 5%. How many people live there now?
  18. 18.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  19. 19.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  20. 20.The price of a bicycle is ₹4040. It goes up by 50%. What is the new price (in ₹)?
  21. 21.A water tank holds 780 litres. 40% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹3980 to ₹5174. By what percent did it go up?
  23. 23.A shop sells 2740 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  24. 24.A water tank holds 1720 litres. 30% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹1040 to ₹832. By what percent did it come down?
  26. 26.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹1820 to ₹1456. By what percent did it come down?
  28. 28.The price of a bicycle is ₹1200. It goes up by 50%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹820 to ₹1230. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹720 to ₹864. By what percent did it go up?
  31. 31.A water tank holds 420 litres. 20% of the water is used. How many litres are left?
  32. 32.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  33. 33.A town has 420 people. Its population grows by 10%. How many people live there now?
  34. 34.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  35. 35.The price of a school bag changes from ₹4220 to ₹3587. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹2880 to ₹3600. By what percent did it go up?
  37. 37.The price of a bicycle is ₹760. It goes up by 40%. What is the new price (in ₹)?
  38. 38.The price of a school bag changes from ₹820 to ₹697. By what percent did it come down?
  39. 39.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹600 to ₹720. By what percent did it go up?

Answer key

  1. 4344
  2. 3052
  3. 6104
  4. 960
  5. 25
  6. 2250
  7. 20
  8. 49.5
  9. 2280
  10. 688
  11. 2480
  12. 20
  13. 17
  14. 62.5
  15. 37
  16. 1884
  17. 252
  18. 61
  19. 38
  20. 6060
  21. 468
  22. 30
  23. 3288
  24. 1204
  25. 20
  26. 33.5
  27. 20
  28. 1800
  29. 50
  30. 20
  31. 336
  32. 55
  33. 462
  34. 47.5
  35. 15
  36. 25
  37. 1064
  38. 15
  39. 20.75
  40. 20

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