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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 601 · 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 900 people. Its population grows by 20%. How many people live there now?
  2. 2.A water tank holds 2980 litres. 30% of the water is used. How many litres are left?
  3. 3.A water tank holds 4600 litres. 15% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹1520 to ₹1216. By what percent did it come down?
  5. 5.The price of a school bag changes from ₹4520 to ₹5650. By what percent did it go up?
  6. 6.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.A town has 1600 people. Its population grows by 25%. How many people live there now?
  8. 8.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  9. 9.A water tank holds 3320 litres. 20% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹3860. It goes up by 15%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹4440 to ₹2220. By what percent did it come down?
  12. 12.A shop sells 4400 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  13. 13.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  14. 14.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  15. 15.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  16. 16.The price of a school bag changes from ₹3680 to ₹2576. By what percent did it come down?
  17. 17.A water tank holds 4060 litres. 25% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹4760 to ₹2380. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹2420 to ₹3146. By what percent did it go up?
  20. 20.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  21. 21.The price of a school bag changes from ₹500 to ₹300. By what percent did it come down?
  22. 22.A town has 1200 people. Its population grows by 15%. How many people live there now?
  23. 23.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  24. 24.A town has 600 people. Its population grows by 5%. How many people live there now?
  25. 25.The price of a bicycle is ₹4960. It goes up by 20%. What is the new price (in ₹)?
  26. 26.A water tank holds 2480 litres. 10% of the water is used. How many litres are left?
  27. 27.A town has 4160 people. Its population grows by 20%. How many people live there now?
  28. 28.A shop sells 1900 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  29. 29.The price of a bicycle is ₹4760. It goes up by 20%. What is the new price (in ₹)?
  30. 30.The price of a bicycle is ₹4820. It goes up by 40%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹4160 to ₹6240. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹220 to ₹330. By what percent did it go up?
  33. 33.A shop sells 1080 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  34. 34.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  35. 35.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  36. 36.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹920 to ₹1196. By what percent did it go up?
  38. 38.The price of a school bag changes from ₹80 to ₹112. By what percent did it go up?
  39. 39.A price goes up by 25% 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 ₹2220 to ₹1665. By what percent did it come down?

Answer key

  1. 1080
  2. 2086
  3. 3910
  4. 20
  5. 25
  6. 21
  7. 2000
  8. 28
  9. 2656
  10. 4439
  11. 50
  12. 5720
  13. 49.5
  14. 47
  15. 33.5
  16. 30
  17. 3045
  18. 50
  19. 30
  20. 49
  21. 40
  22. 1380
  23. 26
  24. 630
  25. 5952
  26. 2232
  27. 4992
  28. 2185
  29. 5712
  30. 6748
  31. 50
  32. 50
  33. 1134
  34. 57.5
  35. 36.5
  36. 82
  37. 30
  38. 40
  39. 31.25
  40. 25

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