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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 229 · 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 ₹1360 to ₹1496. By what percent did it go up?
  2. 2.The price of a school bag changes from ₹2620 to ₹3406. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹3700 to ₹5180. By what percent did it go up?
  4. 4.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  5. 5.A water tank holds 1480 litres. 50% of the water is used. How many litres are left?
  6. 6.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  7. 7.A shop sells 480 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  8. 8.The price of a bicycle is ₹2740. It goes up by 10%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹1620 to ₹1701. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹2900 to ₹2465. By what percent did it come down?
  11. 11.A water tank holds 4140 litres. 40% of the water is used. How many litres are left?
  12. 12.A water tank holds 1960 litres. 5% of the water is used. How many litres are left?
  13. 13.A town has 3060 people. Its population grows by 5%. How many people live there now?
  14. 14.A water tank holds 1900 litres. 30% of the water is used. How many litres are left?
  15. 15.A water tank holds 4720 litres. 20% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹2720 to ₹2992. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹4560 to ₹3420. By what percent did it come down?
  18. 18.A shop sells 4080 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  19. 19.A water tank holds 740 litres. 20% of the water is used. How many litres are left?
  20. 20.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  21. 21.A shop sells 2580 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  22. 22.A town has 3300 people. Its population grows by 20%. How many people live there now?
  23. 23.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  24. 24.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹2900 to ₹3625. By what percent did it go up?
  26. 26.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  27. 27.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  28. 28.A water tank holds 1820 litres. 20% of the water is used. How many litres are left?
  29. 29.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.A shop sells 3120 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  31. 31.The price of a bicycle is ₹2760. It goes up by 30%. What is the new price (in ₹)?
  32. 32.A town has 4020 people. Its population grows by 25%. How many people live there now?
  33. 33.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 1480 litres. 40% of the water is used. How many litres are left?
  35. 35.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.A shop sells 1480 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.A shop sells 3160 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  38. 38.The price of a school bag changes from ₹4880 to ₹5368. By what percent did it go up?
  39. 39.The price of a bicycle is ₹1180. It goes up by 50%. What is the new price (in ₹)?
  40. 40.The price of a school bag changes from ₹3840 to ₹4608. By what percent did it go up?

Answer key

  1. 10
  2. 30
  3. 40
  4. 82
  5. 740
  6. 44
  7. 576
  8. 3014
  9. 5
  10. 15
  11. 2484
  12. 1862
  13. 3213
  14. 1330
  15. 3776
  16. 10
  17. 25
  18. 4488
  19. 592
  20. 64
  21. 2967
  22. 3960
  23. 38
  24. 33.5
  25. 25
  26. 4.5
  27. 56
  28. 1456
  29. 68
  30. 3432
  31. 3588
  32. 5025
  33. 95
  34. 888
  35. 52
  36. 1702
  37. 3318
  38. 10
  39. 1770
  40. 20

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