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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 654 · 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 50% and then goes up by 25% more. By what percent has it gone up in all? =
  2. 2.A town has 1760 people. Its population grows by 40%. How many people live there now?
  3. 3.The price of a school bag changes from ₹4480 to ₹2688. By what percent did it come down?
  4. 4.The price of a bicycle is ₹160. It goes up by 50%. What is the new price (in ₹)?
  5. 5.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  6. 6.A water tank holds 680 litres. 20% of the water is used. How many litres are left?
  7. 7.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  8. 8.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  9. 9.A shop sells 700 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  10. 10.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  11. 11.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  12. 12.A water tank holds 1520 litres. 50% of the water is used. How many litres are left?
  13. 13.A water tank holds 1700 litres. 30% of the water is used. How many litres are left?
  14. 14.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  15. 15.The price of a bicycle is ₹3480. It goes up by 20%. What is the new price (in ₹)?
  16. 16.A town has 2780 people. Its population grows by 25%. How many people live there now?
  17. 17.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹4780 to ₹5975. By what percent did it go up?
  19. 19.A water tank holds 4600 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹4520 to ₹4972. By what percent did it go up?
  21. 21.A town has 4840 people. Its population grows by 50%. How many people live there now?
  22. 22.A town has 120 people. Its population grows by 25%. How many people live there now?
  23. 23.The price of a bicycle is ₹200. It goes up by 20%. What is the new price (in ₹)?
  24. 24.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  25. 25.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  26. 26.A water tank holds 2940 litres. 30% of the water is used. How many litres are left?
  27. 27.A water tank holds 4880 litres. 40% of the water is used. How many litres are left?
  28. 28.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  29. 29.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  30. 30.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 3280 litres. 20% of the water is used. How many litres are left?
  32. 32.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  33. 33.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 2460 litres. 5% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹4760 to ₹4284. By what percent did it come down?
  36. 36.A town has 3760 people. Its population grows by 50%. How many people live there now?
  37. 37.A town has 680 people. Its population grows by 15%. How many people live there now?
  38. 38.A town has 1000 people. Its population grows by 10%. How many people live there now?
  39. 39.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  40. 40.A shop sells 4920 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?

Answer key

  1. 87.5
  2. 2464
  3. 40
  4. 240
  5. 23.5
  6. 544
  7. 49.5
  8. 49
  9. 770
  10. 28.75
  11. 55
  12. 760
  13. 1190
  14. 36.25
  15. 4176
  16. 3475
  17. 125
  18. 25
  19. 3220
  20. 10
  21. 7260
  22. 150
  23. 240
  24. 82
  25. 23.5
  26. 2058
  27. 2928
  28. 10.25
  29. 52.5
  30. 43.75
  31. 2624
  32. 69
  33. 31.25
  34. 2337
  35. 10
  36. 5640
  37. 782
  38. 1100
  39. 55
  40. 5904

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