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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 688 · 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 400 people. Its population grows by 5%. How many people live there now?
  2. 2.The price of a school bag changes from ₹4320 to ₹4752. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹1200 to ₹1140. By what percent did it come down?
  4. 4.The price of a school bag changes from ₹3380 to ₹1690. By what percent did it come down?
  5. 5.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹2680 to ₹2412. By what percent did it come down?
  7. 7.A town has 3280 people. Its population grows by 30%. How many people live there now?
  8. 8.The price of a school bag changes from ₹3140 to ₹2355. By what percent did it come down?
  9. 9.A water tank holds 2040 litres. 15% of the water is used. How many litres are left?
  10. 10.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  12. 12.The price of a bicycle is ₹2000. It goes up by 30%. What is the new price (in ₹)?
  13. 13.The price of a bicycle is ₹3940. It goes up by 50%. What is the new price (in ₹)?
  14. 14.A shop sells 4540 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  15. 15.A water tank holds 3620 litres. 15% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹860. It goes up by 15%. What is the new price (in ₹)?
  17. 17.A shop sells 3540 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹2260 to ₹2486. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹4500 to ₹3150. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹1460 to ₹1241. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹880 to ₹660. By what percent did it come down?
  22. 22.A shop sells 3220 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹4020 to ₹5628. By what percent did it go up?
  24. 24.A shop sells 4980 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  25. 25.The price of a school bag changes from ₹4400 to ₹5280. By what percent did it go up?
  26. 26.A water tank holds 3660 litres. 25% of the water is used. How many litres are left?
  27. 27.A town has 4720 people. Its population grows by 20%. How many people live there now?
  28. 28.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  29. 29.A water tank holds 3120 litres. 15% of the water is used. How many litres are left?
  30. 30.A shop sells 4760 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 4900 litres. 30% of the water is used. How many litres are left?
  32. 32.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  33. 33.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹980 to ₹1029. By what percent did it go up?
  35. 35.A water tank holds 4980 litres. 15% of the water is used. How many litres are left?
  36. 36.A town has 4780 people. Its population grows by 30%. How many people live there now?
  37. 37.A shop sells 4440 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  38. 38.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 2700 litres. 15% of the water is used. How many litres are left?
  40. 40.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =

Answer key

  1. 420
  2. 10
  3. 5
  4. 50
  5. 28.75
  6. 10
  7. 4264
  8. 25
  9. 1734
  10. 57.5
  11. 57.5
  12. 2600
  13. 5910
  14. 5675
  15. 3077
  16. 989
  17. 4602
  18. 10
  19. 30
  20. 15
  21. 25
  22. 4025
  23. 40
  24. 5727
  25. 20
  26. 2745
  27. 5664
  28. 40
  29. 2652
  30. 4998
  31. 3430
  32. 43.75
  33. 43
  34. 5
  35. 4233
  36. 6214
  37. 5328
  38. 61
  39. 2295
  40. 62.5

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