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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 171 · 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 4300 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹2440. It goes up by 25%. What is the new price (in ₹)?
  3. 3.A water tank holds 2880 litres. 25% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹2900 to ₹3045. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹4200 to ₹2520. By what percent did it come down?
  6. 6.A water tank holds 300 litres. 50% of the water is used. How many litres are left?
  7. 7.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  8. 8.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  9. 9.A shop sells 3020 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  10. 10.The price of a bicycle is ₹3740. It goes up by 15%. What is the new price (in ₹)?
  11. 11.A water tank holds 140 litres. 15% of the water is used. How many litres are left?
  12. 12.A water tank holds 480 litres. 20% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹3080. It goes up by 5%. What is the new price (in ₹)?
  14. 14.A water tank holds 1880 litres. 30% of the water is used. How many litres are left?
  15. 15.A water tank holds 1000 litres. 40% of the water is used. How many litres are left?
  16. 16.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹1060 to ₹1166. By what percent did it go up?
  18. 18.A town has 4980 people. Its population grows by 5%. How many people live there now?
  19. 19.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  20. 20.The price of a school bag changes from ₹3680 to ₹4232. By what percent did it go up?
  21. 21.The price of a bicycle is ₹2660. It goes up by 30%. What is the new price (in ₹)?
  22. 22.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 2460 litres. 30% of the water is used. How many litres are left?
  24. 24.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  25. 25.A town has 1480 people. Its population grows by 15%. How many people live there now?
  26. 26.A water tank holds 4360 litres. 15% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹2180. It goes up by 5%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹3440 to ₹3784. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹900 to ₹1260. By what percent did it go up?
  30. 30.A water tank holds 880 litres. 40% of the water is used. How many litres are left?
  31. 31.A town has 3320 people. Its population grows by 15%. How many people live there now?
  32. 32.The price of a bicycle is ₹3640. It goes up by 15%. What is the new price (in ₹)?
  33. 33.The price of a bicycle is ₹4920. It goes up by 15%. What is the new price (in ₹)?
  34. 34.A water tank holds 2260 litres. 5% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹1960 to ₹2254. By what percent did it go up?
  36. 36.A town has 1540 people. Its population grows by 10%. How many people live there now?
  37. 37.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹2140 to ₹1498. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹2700 to ₹2025. By what percent did it come down?
  40. 40.A town has 4540 people. Its population grows by 5%. How many people live there now?

Answer key

  1. 3655
  2. 3050
  3. 2160
  4. 5
  5. 40
  6. 150
  7. 10.5
  8. 12.5
  9. 3775
  10. 4301
  11. 119
  12. 384
  13. 3234
  14. 1316
  15. 600
  16. 57.5
  17. 10
  18. 5229
  19. 46
  20. 15
  21. 3458
  22. 62.5
  23. 1722
  24. 82
  25. 1702
  26. 3706
  27. 2289
  28. 10
  29. 40
  30. 528
  31. 3818
  32. 4186
  33. 5658
  34. 2147
  35. 15
  36. 1694
  37. 792
  38. 30
  39. 25
  40. 4767

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