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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 395 · 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 760 litres. 10% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1920 to ₹1824. By what percent did it come down?
  3. 3.A town has 1400 people. Its population grows by 25%. How many people live there now?
  4. 4.A water tank holds 3860 litres. 5% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹3520 to ₹5280. By what percent did it go up?
  6. 6.A water tank holds 800 litres. 25% of the water is used. How many litres are left?
  7. 7.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  8. 8.A water tank holds 3560 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 4020 litres. 40% of the water is used. How many litres are left?
  10. 10.A town has 2380 people. Its population grows by 15%. How many people live there now?
  11. 11.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  12. 12.A water tank holds 3860 litres. 10% of the water is used. How many litres are left?
  13. 13.A town has 2540 people. Its population grows by 5%. How many people live there now?
  14. 14.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  15. 15.A water tank holds 4240 litres. 20% of the water is used. How many litres are left?
  16. 16.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹4520. It goes up by 50%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹3440. It goes up by 40%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹600 to ₹480. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹3060 to ₹3978. By what percent did it go up?
  21. 21.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹2140 to ₹1712. By what percent did it come down?
  23. 23.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  24. 24.A town has 4460 people. Its population grows by 5%. How many people live there now?
  25. 25.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  26. 26.The price of a school bag changes from ₹1000 to ₹1100. By what percent did it go up?
  27. 27.A water tank holds 120 litres. 5% of the water is used. How many litres are left?
  28. 28.A water tank holds 860 litres. 50% of the water is used. How many litres are left?
  29. 29.A water tank holds 2100 litres. 15% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1100 to ₹1375. By what percent did it go up?
  31. 31.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  32. 32.A town has 4960 people. Its population grows by 10%. How many people live there now?
  33. 33.A water tank holds 2740 litres. 5% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹2140 to ₹2996. By what percent did it go up?
  35. 35.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  36. 36.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  37. 37.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹4400 to ₹4840. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹460 to ₹506. By what percent did it go up?
  40. 40.A town has 640 people. Its population grows by 15%. How many people live there now?

Answer key

  1. 684
  2. 5
  3. 1750
  4. 3667
  5. 50
  6. 600
  7. 12.5
  8. 3382
  9. 2412
  10. 2737
  11. 26.5
  12. 3474
  13. 2667
  14. 54
  15. 3392
  16. 20
  17. 6780
  18. 4816
  19. 20
  20. 30
  21. 20.75
  22. 20
  23. 62.5
  24. 4683
  25. 43
  26. 10
  27. 114
  28. 430
  29. 1785
  30. 25
  31. 96
  32. 5456
  33. 2603
  34. 40
  35. 52.5
  36. 5
  37. 3.5
  38. 10
  39. 10
  40. 736

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