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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 651 · 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 town has 800 people. Its population grows by 5%. How many people live there now?
  2. 2.The price of a school bag changes from ₹3180 to ₹3339. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹4200 to ₹4620. By what percent did it go up?
  4. 4.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  5. 5.The price of a bicycle is ₹820. It goes up by 30%. What is the new price (in ₹)?
  6. 6.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  7. 7.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 3220 litres. 25% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹120 to ₹84. By what percent did it come down?
  10. 10.A shop sells 2460 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  11. 11.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  12. 12.The price of a bicycle is ₹2120. It goes up by 40%. What is the new price (in ₹)?
  13. 13.A town has 3280 people. Its population grows by 20%. How many people live there now?
  14. 14.The price of a school bag changes from ₹2200 to ₹1980. By what percent did it come down?
  15. 15.A water tank holds 2360 litres. 25% of the water is used. How many litres are left?
  16. 16.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹3480. It goes up by 15%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹1500 to ₹1725. By what percent did it go up?
  19. 19.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹4280 to ₹3638. By what percent did it come down?
  21. 21.A shop sells 1160 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  22. 22.A water tank holds 80 litres. 50% of the water is used. How many litres are left?
  23. 23.A shop sells 520 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  24. 24.A town has 2720 people. Its population grows by 25%. How many people live there now?
  25. 25.The price of a school bag changes from ₹800 to ₹560. By what percent did it come down?
  26. 26.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  27. 27.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  28. 28.A town has 4940 people. Its population grows by 10%. How many people live there now?
  29. 29.A town has 4920 people. Its population grows by 40%. How many people live there now?
  30. 30.The price of a school bag changes from ₹480 to ₹336. By what percent did it come down?
  31. 31.A shop sells 780 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  32. 32.The price of a school bag changes from ₹3240 to ₹2916. By what percent did it come down?
  33. 33.A water tank holds 3820 litres. 40% of the water is used. How many litres are left?
  34. 34.A water tank holds 180 litres. 20% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹2660 to ₹1862. By what percent did it come down?
  36. 36.The price of a bicycle is ₹280. It goes up by 5%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹3320 to ₹2822. By what percent did it come down?
  38. 38.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  39. 39.A shop sells 4060 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  40. 40.The price of a bicycle is ₹1440. It goes up by 30%. What is the new price (in ₹)?

Answer key

  1. 840
  2. 5
  3. 10
  4. 26
  5. 1066
  6. 14.5
  7. 31.25
  8. 2415
  9. 30
  10. 2583
  11. 43
  12. 2968
  13. 3936
  14. 10
  15. 1770
  16. 32
  17. 4002
  18. 15
  19. 32
  20. 15
  21. 1624
  22. 40
  23. 624
  24. 3400
  25. 30
  26. 87.5
  27. 27.75
  28. 5434
  29. 6888
  30. 30
  31. 897
  32. 10
  33. 2292
  34. 144
  35. 30
  36. 294
  37. 15
  38. 38
  39. 5278
  40. 1872

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