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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 206 · 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 goes up by 40% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 2840 litres. 5% of the water is used. How many litres are left?
  3. 3.A town has 480 people. Its population grows by 30%. How many people live there now?
  4. 4.The price of a bicycle is ₹3780. It goes up by 10%. What is the new price (in ₹)?
  5. 5.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹660 to ₹561. By what percent did it come down?
  7. 7.A shop sells 3660 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  8. 8.The price of a school bag changes from ₹1480 to ₹1332. By what percent did it come down?
  9. 9.A water tank holds 3380 litres. 5% of the water is used. How many litres are left?
  10. 10.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  11. 11.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  12. 12.The price of a bicycle is ₹1880. It goes up by 30%. What is the new price (in ₹)?
  13. 13.A water tank holds 2940 litres. 25% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹2820 to ₹2961. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹4920 to ₹5904. By what percent did it go up?
  16. 16.A town has 420 people. Its population grows by 20%. How many people live there now?
  17. 17.A shop sells 100 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  18. 18.The price of a bicycle is ₹1520. It goes up by 25%. What is the new price (in ₹)?
  19. 19.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  20. 20.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  21. 21.A shop sells 4620 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  22. 22.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  23. 23.A water tank holds 880 litres. 25% of the water is used. How many litres are left?
  24. 24.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.A shop sells 1060 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  26. 26.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  27. 27.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  28. 28.A water tank holds 4540 litres. 10% of the water is used. How many litres are left?
  29. 29.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  30. 30.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹780 to ₹624. By what percent did it come down?
  32. 32.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  34. 34.A town has 1180 people. Its population grows by 30%. How many people live there now?
  35. 35.A water tank holds 4460 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹3640. It goes up by 15%. What is the new price (in ₹)?
  37. 37.A town has 1760 people. Its population grows by 30%. How many people live there now?
  38. 38.A town has 1880 people. Its population grows by 50%. How many people live there now?
  39. 39.A shop sells 4700 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹2040 to ₹1428. By what percent did it come down?

Answer key

  1. 61
  2. 2698
  3. 624
  4. 4158
  5. 18.75
  6. 15
  7. 4575
  8. 10
  9. 3211
  10. 28.75
  11. 36.25
  12. 2444
  13. 2205
  14. 5
  15. 20
  16. 504
  17. 110
  18. 1900
  19. 82
  20. 95
  21. 4851
  22. 52.5
  23. 660
  24. 70
  25. 1219
  26. 55
  27. 15.5
  28. 4086
  29. 20.75
  30. 26
  31. 20
  32. 19.25
  33. 26.5
  34. 1534
  35. 4237
  36. 4186
  37. 2288
  38. 2820
  39. 6580
  40. 30

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