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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 114 · 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 shop sells 2800 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  2. 2.The price of a school bag changes from ₹200 to ₹120. By what percent did it come down?
  3. 3.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  4. 4.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹4700 to ₹5405. By what percent did it go up?
  6. 6.A water tank holds 1300 litres. 10% of the water is used. How many litres are left?
  7. 7.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  8. 8.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  9. 9.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  10. 10.A water tank holds 840 litres. 10% of the water is used. How many litres are left?
  11. 11.A water tank holds 3860 litres. 10% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹1220. It goes up by 20%. What is the new price (in ₹)?
  13. 13.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  14. 14.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  15. 15.A water tank holds 520 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹4040 to ₹2828. By what percent did it come down?
  17. 17.The price of a school bag changes from ₹2360 to ₹1180. By what percent did it come down?
  18. 18.A town has 3120 people. Its population grows by 40%. How many people live there now?
  19. 19.A town has 3520 people. Its population grows by 15%. How many people live there now?
  20. 20.The price of a school bag changes from ₹820 to ₹574. By what percent did it come down?
  21. 21.The price of a bicycle is ₹600. It goes up by 50%. What is the new price (in ₹)?
  22. 22.The price of a bicycle is ₹1320. It goes up by 30%. What is the new price (in ₹)?
  23. 23.A water tank holds 1840 litres. 10% of the water is used. How many litres are left?
  24. 24.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  25. 25.A shop sells 3880 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  26. 26.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  27. 27.A shop sells 4380 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  28. 28.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  29. 29.A shop sells 3060 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  30. 30.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  31. 31.The price of a school bag changes from ₹680 to ₹510. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹4800 to ₹4080. By what percent did it come down?
  33. 33.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  34. 34.A town has 2300 people. Its population grows by 25%. How many people live there now?
  35. 35.The price of a school bag changes from ₹800 to ₹680. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹3100 to ₹2170. By what percent did it come down?
  37. 37.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  39. 39.A water tank holds 3500 litres. 20% of the water is used. How many litres are left?
  40. 40.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =

Answer key

  1. 3080
  2. 40
  3. 37
  4. 61
  5. 15
  6. 1170
  7. 4
  8. 14
  9. 32
  10. 756
  11. 3474
  12. 1464
  13. 51
  14. 4.5
  15. 494
  16. 30
  17. 50
  18. 4368
  19. 4048
  20. 30
  21. 900
  22. 1716
  23. 1656
  24. 15.5
  25. 4656
  26. 10.5
  27. 5694
  28. 32
  29. 3213
  30. 27.75
  31. 25
  32. 15
  33. 12.5
  34. 2875
  35. 15
  36. 30
  37. 43.75
  38. 18.75
  39. 2800
  40. 28

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