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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 251 · 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 40% and then goes up by 50% more. By what percent has it gone up in all? =
  2. 2.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  3. 3.A town has 4240 people. Its population grows by 30%. How many people live there now?
  4. 4.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  5. 5.A shop sells 3800 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  6. 6.The price of a school bag changes from ₹1100 to ₹880. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹4080 to ₹3672. By what percent did it come down?
  8. 8.The price of a bicycle is ₹1520. It goes up by 25%. What is the new price (in ₹)?
  9. 9.A town has 420 people. Its population grows by 40%. How many people live there now?
  10. 10.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹520 to ₹364. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹4320 to ₹4104. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹3180 to ₹3816. By what percent did it go up?
  14. 14.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  15. 15.A shop sells 1420 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  16. 16.A town has 2240 people. Its population grows by 40%. How many people live there now?
  17. 17.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  18. 18.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹1280. It goes up by 5%. What is the new price (in ₹)?
  20. 20.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 1580 litres. 5% of the water is used. How many litres are left?
  22. 22.A water tank holds 1880 litres. 50% of the water is used. How many litres are left?
  23. 23.A water tank holds 920 litres. 15% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹2620 to ₹3406. By what percent did it go up?
  25. 25.A water tank holds 2620 litres. 25% of the water is used. How many litres are left?
  26. 26.A town has 360 people. Its population grows by 10%. How many people live there now?
  27. 27.A town has 3860 people. Its population grows by 5%. How many people live there now?
  28. 28.The price of a school bag changes from ₹1520 to ₹1368. By what percent did it come down?
  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 water tank holds 3360 litres. 10% of the water is used. How many litres are left?
  31. 31.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 3840 litres. 15% of the water is used. How many litres are left?
  33. 33.A water tank holds 940 litres. 20% of the water is used. How many litres are left?
  34. 34.A town has 640 people. Its population grows by 10%. How many people live there now?
  35. 35.The price of a school bag changes from ₹3500 to ₹4200. By what percent did it go up?
  36. 36.The price of a bicycle is ₹320. It goes up by 25%. What is the new price (in ₹)?
  37. 37.A water tank holds 3400 litres. 30% of the water is used. How many litres are left?
  38. 38.A shop sells 3960 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  39. 39.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹1220 to ₹1586. By what percent did it go up?

Answer key

  1. 110
  2. 3.5
  3. 5512
  4. 32.25
  5. 5320
  6. 20
  7. 10
  8. 1900
  9. 588
  10. 33.5
  11. 30
  12. 5
  13. 20
  14. 54
  15. 1846
  16. 3136
  17. 57.5
  18. 4
  19. 1344
  20. 36.5
  21. 1501
  22. 940
  23. 782
  24. 30
  25. 1965
  26. 396
  27. 4053
  28. 10
  29. 20.75
  30. 3024
  31. 56
  32. 3264
  33. 752
  34. 704
  35. 20
  36. 400
  37. 2380
  38. 4752
  39. 49.5
  40. 30

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