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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 725 · 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.The price of a school bag changes from ₹3840 to ₹3456. By what percent did it come down?
  2. 2.The price of a school bag changes from ₹2360 to ₹1770. By what percent did it come down?
  3. 3.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 3120 litres. 30% of the water is used. How many litres are left?
  5. 5.A water tank holds 2060 litres. 15% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹1780 to ₹1424. By what percent did it come down?
  7. 7.A shop sells 4440 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  8. 8.A shop sells 1160 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹2180 to ₹2616. By what percent did it go up?
  10. 10.A water tank holds 3960 litres. 50% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹1660 to ₹1577. By what percent did it come down?
  12. 12.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  13. 13.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  14. 14.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  15. 15.A water tank holds 3860 litres. 50% of the water is used. How many litres are left?
  16. 16.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹3720 to ₹4464. By what percent did it go up?
  18. 18.A water tank holds 3320 litres. 10% of the water is used. How many litres are left?
  19. 19.A water tank holds 4420 litres. 20% of the water is used. How many litres are left?
  20. 20.A water tank holds 1920 litres. 10% of the water is used. How many litres are left?
  21. 21.A town has 4260 people. Its population grows by 50%. How many people live there now?
  22. 22.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  23. 23.A shop sells 2460 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  24. 24.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  25. 25.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  26. 26.A water tank holds 1880 litres. 25% of the water is used. How many litres are left?
  27. 27.A town has 3340 people. Its population grows by 10%. How many people live there now?
  28. 28.The price of a bicycle is ₹4900. It goes up by 50%. What is the new price (in ₹)?
  29. 29.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  30. 30.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  31. 31.The price of a school bag changes from ₹4300 to ₹3225. By what percent did it come down?
  32. 32.A water tank holds 2780 litres. 25% of the water is used. How many litres are left?
  33. 33.A shop sells 2520 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹160 to ₹176. By what percent did it go up?
  35. 35.A water tank holds 2700 litres. 10% of the water is used. How many litres are left?
  36. 36.A town has 760 people. Its population grows by 5%. How many people live there now?
  37. 37.A town has 580 people. Its population grows by 30%. How many people live there now?
  38. 38.A town has 3200 people. Its population grows by 40%. How many people live there now?
  39. 39.The price of a school bag changes from ₹4760 to ₹4998. By what percent did it go up?
  40. 40.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 10
  2. 25
  3. 43
  4. 2184
  5. 1751
  6. 20
  7. 5328
  8. 1450
  9. 20
  10. 1980
  11. 5
  12. 24
  13. 37
  14. 51
  15. 1930
  16. 27.75
  17. 20
  18. 2988
  19. 3536
  20. 1728
  21. 6390
  22. 28
  23. 2706
  24. 9.25
  25. 21
  26. 1410
  27. 3674
  28. 7350
  29. 43.75
  30. 9.75
  31. 25
  32. 2085
  33. 2772
  34. 10
  35. 2430
  36. 798
  37. 754
  38. 4480
  39. 5
  40. 32

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