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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 198 · 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 price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  2. 2.A water tank holds 140 litres. 50% of the water is used. How many litres are left?
  3. 3.A water tank holds 60 litres. 15% of the water is used. How many litres are left?
  4. 4.A town has 1340 people. Its population grows by 40%. How many people live there now?
  5. 5.The price of a school bag changes from ₹3040 to ₹3800. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹3580 to ₹3759. By what percent did it go up?
  7. 7.The price of a bicycle is ₹4940. It goes up by 40%. What is the new price (in ₹)?
  8. 8.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  9. 9.The price of a bicycle is ₹3980. It goes up by 40%. What is the new price (in ₹)?
  10. 10.The price of a school bag changes from ₹1540 to ₹1232. By what percent did it come down?
  11. 11.The price of a bicycle is ₹1700. It goes up by 20%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹360 to ₹468. By what percent did it go up?
  13. 13.The price of a bicycle is ₹980. It goes up by 30%. What is the new price (in ₹)?
  14. 14.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  15. 15.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  16. 16.A town has 1320 people. Its population grows by 5%. How many people live there now?
  17. 17.The price of a bicycle is ₹4040. It goes up by 40%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹1100 to ₹770. By what percent did it come down?
  19. 19.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 220 litres. 40% of the water is used. How many litres are left?
  21. 21.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹1560 to ₹1638. By what percent did it go up?
  23. 23.A water tank holds 500 litres. 50% of the water is used. How many litres are left?
  24. 24.A water tank holds 2660 litres. 5% of the water is used. How many litres are left?
  25. 25.A water tank holds 3340 litres. 25% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹960. It goes up by 10%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹3600 to ₹2520. By what percent did it come down?
  28. 28.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 3440 litres. 50% of the water is used. How many litres are left?
  30. 30.A water tank holds 3360 litres. 40% of the water is used. How many litres are left?
  31. 31.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  32. 32.A water tank holds 760 litres. 50% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹3380 to ₹2873. By what percent did it come down?
  34. 34.A shop sells 2980 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  35. 35.A water tank holds 4580 litres. 40% of the water is used. How many litres are left?
  36. 36.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹2940 to ₹3234. By what percent did it go up?
  38. 38.A water tank holds 1420 litres. 30% of the water is used. How many litres are left?
  39. 39.A shop sells 640 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  40. 40.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =

Answer key

  1. 9.25
  2. 70
  3. 51
  4. 1876
  5. 25
  6. 5
  7. 6916
  8. 40
  9. 5572
  10. 20
  11. 2040
  12. 30
  13. 1274
  14. 15.5
  15. 19
  16. 1386
  17. 5656
  18. 30
  19. 37.5
  20. 132
  21. 55
  22. 5
  23. 250
  24. 2527
  25. 2505
  26. 1056
  27. 30
  28. 87.5
  29. 1720
  30. 2016
  31. 55
  32. 380
  33. 15
  34. 4172
  35. 2748
  36. 12.5
  37. 10
  38. 994
  39. 800
  40. 38

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