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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 123 · 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.The price of a school bag changes from ₹1340 to ₹1474. By what percent did it go up?
  2. 2.The price of a school bag changes from ₹360 to ₹252. By what percent did it come down?
  3. 3.A price goes up by 15% 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 ₹2260 to ₹2599. By what percent did it go up?
  5. 5.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹1180 to ₹885. By what percent did it come down?
  7. 7.A water tank holds 1400 litres. 20% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1940 to ₹2037. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹3280 to ₹2624. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹1920 to ₹2016. By what percent did it go up?
  11. 11.A town has 4340 people. Its population grows by 50%. How many people live there now?
  12. 12.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  13. 13.The price of a bicycle is ₹1280. It goes up by 5%. What is the new price (in ₹)?
  14. 14.The price of a bicycle is ₹3680. It goes up by 25%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹4500. It goes up by 25%. What is the new price (in ₹)?
  16. 16.A water tank holds 300 litres. 15% of the water is used. How many litres are left?
  17. 17.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹3660. It goes up by 50%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹400 to ₹600. By what percent did it go up?
  20. 20.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  21. 21.A water tank holds 200 litres. 25% of the water is used. How many litres are left?
  22. 22.A town has 3920 people. Its population grows by 20%. How many people live there now?
  23. 23.A water tank holds 4800 litres. 40% of the water is used. How many litres are left?
  24. 24.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  25. 25.The price of a bicycle is ₹2760. It goes up by 25%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹4260 to ₹3621. By what percent did it come down?
  27. 27.The price of a bicycle is ₹3780. It goes up by 15%. What is the new price (in ₹)?
  28. 28.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  29. 29.A water tank holds 680 litres. 20% of the water is used. How many litres are left?
  30. 30.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  31. 31.A water tank holds 4360 litres. 10% of the water is used. How many litres are left?
  32. 32.A water tank holds 2720 litres. 50% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1480 to ₹1184. By what percent did it come down?
  34. 34.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  35. 35.A town has 880 people. Its population grows by 30%. How many people live there now?
  36. 36.The price of a school bag changes from ₹1300 to ₹1950. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹260 to ₹286. By what percent did it go up?
  38. 38.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  39. 39.A shop sells 2340 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  40. 40.A water tank holds 1260 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 10
  2. 30
  3. 32.25
  4. 15
  5. 96
  6. 25
  7. 1120
  8. 5
  9. 20
  10. 5
  11. 6510
  12. 20.75
  13. 1344
  14. 4600
  15. 5625
  16. 255
  17. 2
  18. 5490
  19. 50
  20. 17
  21. 150
  22. 4704
  23. 2880
  24. 35
  25. 3450
  26. 15
  27. 4347
  28. 75
  29. 544
  30. 55
  31. 3924
  32. 1360
  33. 20
  34. 57.5
  35. 1144
  36. 50
  37. 10
  38. 40
  39. 2808
  40. 1008

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