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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 388 · 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 1920 litres. 10% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹1520. It goes up by 50%. What is the new price (in ₹)?
  3. 3.A town has 4940 people. Its population grows by 50%. How many people live there now?
  4. 4.A shop sells 1120 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  5. 5.A town has 400 people. Its population grows by 10%. How many people live there now?
  6. 6.A water tank holds 1940 litres. 5% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹280. It goes up by 10%. What is the new price (in ₹)?
  8. 8.A water tank holds 340 litres. 20% of the water is used. How many litres are left?
  9. 9.A shop sells 300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  10. 10.The price of a school bag changes from ₹4100 to ₹4305. By what percent did it go up?
  11. 11.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  12. 12.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  13. 13.A town has 3020 people. Its population grows by 50%. How many people live there now?
  14. 14.A water tank holds 2060 litres. 50% of the water is used. How many litres are left?
  15. 15.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  16. 16.The price of a bicycle is ₹4100. It goes up by 30%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹1060. It goes up by 40%. What is the new price (in ₹)?
  18. 18.A shop sells 2640 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  19. 19.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 2440 litres. 50% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹4960 to ₹3968. By what percent did it come down?
  22. 22.A water tank holds 3240 litres. 10% of the water is used. How many litres are left?
  23. 23.A water tank holds 1080 litres. 10% of the water is used. How many litres are left?
  24. 24.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹1760 to ₹2024. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹4460 to ₹4237. By what percent did it come down?
  27. 27.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹2400 to ₹1440. By what percent did it come down?
  29. 29.The price of a bicycle is ₹1080. It goes up by 5%. What is the new price (in ₹)?
  30. 30.The price of a school bag changes from ₹2540 to ₹2921. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹4540 to ₹2270. By what percent did it come down?
  32. 32.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  33. 33.The price of a school bag changes from ₹4580 to ₹4809. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹3980 to ₹4378. By what percent did it go up?
  35. 35.A shop sells 2580 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹960 to ₹720. By what percent did it come down?
  37. 37.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  38. 38.A water tank holds 1600 litres. 5% of the water is used. How many litres are left?
  39. 39.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  40. 40.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =

Answer key

  1. 1728
  2. 2280
  3. 7410
  4. 1400
  5. 440
  6. 1843
  7. 308
  8. 272
  9. 390
  10. 5
  11. 61
  12. 61
  13. 4530
  14. 1030
  15. 28.75
  16. 5330
  17. 1484
  18. 3036
  19. 95
  20. 1220
  21. 20
  22. 2916
  23. 972
  24. 32.5
  25. 15
  26. 5
  27. 12
  28. 40
  29. 1134
  30. 15
  31. 50
  32. 47.5
  33. 5
  34. 10
  35. 2967
  36. 25
  37. 36.25
  38. 1520
  39. 70
  40. 15.5

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