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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 810 · 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 price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹3040 to ₹4560. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹4680 to ₹3510. By what percent did it come down?
  4. 4.A water tank holds 800 litres. 10% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1820 to ₹1638. By what percent did it come down?
  6. 6.The price of a bicycle is ₹1180. It goes up by 20%. What is the new price (in ₹)?
  7. 7.A water tank holds 4400 litres. 50% of the water is used. How many litres are left?
  8. 8.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  9. 9.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 160 litres. 40% of the water is used. How many litres are left?
  12. 12.A town has 4680 people. Its population grows by 5%. How many people live there now?
  13. 13.The price of a bicycle is ₹3180. It goes up by 5%. What is the new price (in ₹)?
  14. 14.The price of a bicycle is ₹1180. It goes up by 30%. What is the new price (in ₹)?
  15. 15.A shop sells 2020 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  16. 16.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹1760 to ₹1848. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹1680 to ₹1428. By what percent did it come down?
  19. 19.A water tank holds 4500 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a bicycle is ₹3920. It goes up by 10%. What is the new price (in ₹)?
  21. 21.A town has 4960 people. Its population grows by 10%. How many people live there now?
  22. 22.The price of a school bag changes from ₹3340 to ₹4342. By what percent did it go up?
  23. 23.A town has 4680 people. Its population grows by 10%. How many people live there now?
  24. 24.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  25. 25.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  26. 26.A shop sells 2580 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹4100 to ₹3280. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹560 to ₹672. By what percent did it go up?
  29. 29.A water tank holds 3000 litres. 50% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹920 to ₹1012. By what percent did it go up?
  31. 31.The price of a bicycle is ₹980. It goes up by 20%. What is the new price (in ₹)?
  32. 32.The price of a school bag changes from ₹4840 to ₹5082. By what percent did it go up?
  33. 33.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  34. 34.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  35. 35.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  36. 36.The price of a bicycle is ₹3340. It goes up by 25%. What is the new price (in ₹)?
  37. 37.A shop sells 980 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  38. 38.A water tank holds 1240 litres. 50% of the water is used. How many litres are left?
  39. 39.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  40. 40.A shop sells 3460 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?

Answer key

  1. 9.25
  2. 50
  3. 25
  4. 720
  5. 10
  6. 1416
  7. 2200
  8. 51
  9. 57.5
  10. 26.5
  11. 96
  12. 4914
  13. 3339
  14. 1534
  15. 3030
  16. 62.5
  17. 5
  18. 15
  19. 3150
  20. 4312
  21. 5456
  22. 30
  23. 5148
  24. 56
  25. 32
  26. 3870
  27. 20
  28. 20
  29. 1500
  30. 10
  31. 1176
  32. 5
  33. 6.25
  34. 19
  35. 62.5
  36. 4175
  37. 1372
  38. 620
  39. 26.5
  40. 4325

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