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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 130 · 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 water tank holds 1600 litres. 25% of the water is used. How many litres are left?
  2. 2.A water tank holds 1060 litres. 30% of the water is used. How many litres are left?
  3. 3.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  4. 4.The price of a school bag changes from ₹4660 to ₹5825. By what percent did it go up?
  5. 5.A water tank holds 1100 litres. 5% of the water is used. How many litres are left?
  6. 6.A shop sells 2880 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  7. 7.A town has 1920 people. Its population grows by 50%. How many people live there now?
  8. 8.A water tank holds 980 litres. 40% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹3840 to ₹4032. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹1300 to ₹1950. By what percent did it go up?
  11. 11.A shop sells 1260 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  12. 12.A town has 960 people. Its population grows by 25%. How many people live there now?
  13. 13.A town has 1780 people. Its population grows by 15%. How many people live there now?
  14. 14.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  15. 15.A shop sells 3640 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  16. 16.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  17. 17.A town has 2920 people. Its population grows by 25%. How many people live there now?
  18. 18.A town has 1340 people. Its population grows by 5%. How many people live there now?
  19. 19.A water tank holds 5000 litres. 30% of the water is used. How many litres are left?
  20. 20.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  21. 21.A water tank holds 2300 litres. 30% of the water is used. How many litres are left?
  22. 22.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  23. 23.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  24. 24.The price of a bicycle is ₹4180. It goes up by 30%. What is the new price (in ₹)?
  25. 25.A water tank holds 2700 litres. 40% of the water is used. How many litres are left?
  26. 26.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  27. 27.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹1900 to ₹2090. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹840 to ₹924. By what percent did it go up?
  31. 31.The price of a bicycle is ₹1700. It goes up by 30%. What is the new price (in ₹)?
  32. 32.The price of a bicycle is ₹4440. It goes up by 40%. What is the new price (in ₹)?
  33. 33.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  34. 34.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  35. 35.A shop sells 3360 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹3280 to ₹2296. By what percent did it come down?
  37. 37.The price of a bicycle is ₹500. It goes up by 15%. What is the new price (in ₹)?
  38. 38.The price of a bicycle is ₹2940. It goes up by 50%. What is the new price (in ₹)?
  39. 39.A town has 1260 people. Its population grows by 30%. How many people live there now?
  40. 40.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =

Answer key

  1. 1200
  2. 742
  3. 20.75
  4. 25
  5. 1045
  6. 4320
  7. 2880
  8. 588
  9. 5
  10. 50
  11. 1323
  12. 1200
  13. 2047
  14. 49.5
  15. 4186
  16. 40.5
  17. 3650
  18. 1407
  19. 3500
  20. 32.5
  21. 1610
  22. 110
  23. 82
  24. 5434
  25. 1620
  26. 58
  27. 38
  28. 87.5
  29. 10
  30. 10
  31. 2210
  32. 6216
  33. 37.5
  34. 3.5
  35. 3864
  36. 30
  37. 575
  38. 4410
  39. 1638
  40. 36.5

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