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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 121 · 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 2000 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2080 to ₹2912. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹3580 to ₹3222. By what percent did it come down?
  4. 4.The price of a bicycle is ₹280. It goes up by 50%. What is the new price (in ₹)?
  5. 5.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  6. 6.The price of a bicycle is ₹4300. It goes up by 5%. What is the new price (in ₹)?
  7. 7.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.The price of a bicycle is ₹2640. It goes up by 40%. What is the new price (in ₹)?
  9. 9.A water tank holds 4900 litres. 5% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹2600. It goes up by 5%. What is the new price (in ₹)?
  11. 11.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  12. 12.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  13. 13.A water tank holds 4240 litres. 15% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹1100 to ₹550. By what percent did it come down?
  15. 15.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  16. 16.The price of a school bag changes from ₹3360 to ₹3024. By what percent did it come down?
  17. 17.A town has 1340 people. Its population grows by 20%. How many people live there now?
  18. 18.The price of a bicycle is ₹80. It goes up by 5%. What is the new price (in ₹)?
  19. 19.The price of a bicycle is ₹2200. It goes up by 25%. What is the new price (in ₹)?
  20. 20.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  21. 21.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹3220 to ₹2254. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹1980 to ₹1782. By what percent did it come down?
  24. 24.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹1220. It goes up by 15%. What is the new price (in ₹)?
  27. 27.A water tank holds 1960 litres. 25% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹5000 to ₹6500. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹2680 to ₹3484. By what percent did it go up?
  30. 30.A water tank holds 960 litres. 30% of the water is used. How many litres are left?
  31. 31.A water tank holds 3120 litres. 40% of the water is used. How many litres are left?
  32. 32.A shop sells 1120 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  33. 33.A water tank holds 3240 litres. 5% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹1820 to ₹2275. By what percent did it go up?
  35. 35.A water tank holds 3720 litres. 10% of the water is used. How many litres are left?
  36. 36.A shop sells 640 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  37. 37.A water tank holds 4600 litres. 10% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹2500 to ₹2250. By what percent did it come down?
  39. 39.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 3540 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 1700
  2. 40
  3. 10
  4. 420
  5. 47.5
  6. 4515
  7. 26.5
  8. 3696
  9. 4655
  10. 2730
  11. 43.75
  12. 28.75
  13. 3604
  14. 50
  15. 43.75
  16. 10
  17. 1608
  18. 84
  19. 2750
  20. 23.5
  21. 35
  22. 30
  23. 10
  24. 32.5
  25. 54
  26. 1403
  27. 1470
  28. 30
  29. 30
  30. 672
  31. 1872
  32. 1232
  33. 3078
  34. 25
  35. 3348
  36. 672
  37. 4140
  38. 10
  39. 50
  40. 3186

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