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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 710 · 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 4900 litres. 15% of the water is used. How many litres are left?
  2. 2.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  3. 3.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  4. 4.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  5. 5.The price of a school bag changes from ₹520 to ₹546. By what percent did it go up?
  6. 6.A water tank holds 3960 litres. 50% of the water is used. How many litres are left?
  7. 7.A water tank holds 620 litres. 10% of the water is used. How many litres are left?
  8. 8.A water tank holds 1260 litres. 5% of the water is used. How many litres are left?
  9. 9.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  10. 10.A shop sells 4520 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  11. 11.A water tank holds 1560 litres. 5% of the water is used. How many litres are left?
  12. 12.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  13. 13.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  14. 14.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹3420. It goes up by 5%. What is the new price (in ₹)?
  16. 16.A water tank holds 3440 litres. 25% of the water is used. How many litres are left?
  17. 17.A water tank holds 4360 litres. 40% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹240 to ₹180. By what percent did it come down?
  19. 19.A water tank holds 1560 litres. 10% of the water is used. How many litres are left?
  20. 20.A town has 560 people. Its population grows by 30%. How many people live there now?
  21. 21.The price of a school bag changes from ₹820 to ₹697. By what percent did it come down?
  22. 22.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹2060. It goes up by 30%. What is the new price (in ₹)?
  24. 24.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹900 to ₹540. By what percent did it come down?
  26. 26.A water tank holds 3060 litres. 15% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹960. It goes up by 40%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹2000 to ₹2800. By what percent did it go up?
  29. 29.A water tank holds 4560 litres. 40% of the water is used. How many litres are left?
  30. 30.A water tank holds 780 litres. 15% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹2160 to ₹3240. By what percent did it go up?
  32. 32.A shop sells 300 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  33. 33.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  34. 34.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  35. 35.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  36. 36.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  37. 37.A town has 2100 people. Its population grows by 15%. How many people live there now?
  38. 38.The price of a school bag changes from ₹4100 to ₹5740. By what percent did it go up?
  39. 39.A shop sells 4360 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  40. 40.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =

Answer key

  1. 4165
  2. 60
  3. 28.75
  4. 70
  5. 5
  6. 1980
  7. 558
  8. 1197
  9. 9.25
  10. 4972
  11. 1482
  12. 32.5
  13. 4.5
  14. 38
  15. 3591
  16. 2580
  17. 2616
  18. 25
  19. 1404
  20. 728
  21. 15
  22. 4
  23. 2678
  24. 62.5
  25. 40
  26. 2601
  27. 1344
  28. 40
  29. 2736
  30. 663
  31. 50
  32. 330
  33. 20.75
  34. 42.5
  35. 32
  36. 43
  37. 2415
  38. 40
  39. 4578
  40. 33.5

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