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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 134 · 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 comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  2. 2.The price of a bicycle is ₹4620. It goes up by 25%. What is the new price (in ₹)?
  3. 3.A shop sells 4060 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  4. 4.A town has 860 people. Its population grows by 15%. How many people live there now?
  5. 5.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  6. 6.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  7. 7.A water tank holds 3640 litres. 10% of the water is used. How many litres are left?
  8. 8.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 2360 litres. 30% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹2100 to ₹1995. By what percent did it come down?
  11. 11.A water tank holds 3140 litres. 20% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹1200 to ₹600. By what percent did it come down?
  13. 13.A water tank holds 720 litres. 5% of the water is used. How many litres are left?
  14. 14.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹180 to ₹189. By what percent did it go up?
  16. 16.The price of a bicycle is ₹3240. It goes up by 40%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹320. It goes up by 20%. What is the new price (in ₹)?
  18. 18.A shop sells 2460 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  19. 19.A water tank holds 1200 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹2360 to ₹2124. By what percent did it come down?
  21. 21.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  22. 22.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  23. 23.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  24. 24.A town has 2860 people. Its population grows by 15%. How many people live there now?
  25. 25.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  26. 26.A town has 3360 people. Its population grows by 20%. How many people live there now?
  27. 27.A water tank holds 1480 litres. 10% of the water is used. How many litres are left?
  28. 28.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  29. 29.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  30. 30.A water tank holds 1180 litres. 5% of the water is used. How many litres are left?
  31. 31.A shop sells 1900 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  32. 32.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  33. 33.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  34. 34.The price of a bicycle is ₹4920. It goes up by 20%. What is the new price (in ₹)?
  35. 35.A water tank holds 3180 litres. 15% of the water is used. How many litres are left?
  36. 36.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹2480 to ₹3720. By what percent did it go up?
  38. 38.The price of a school bag changes from ₹2580 to ₹1290. By what percent did it come down?
  39. 39.The price of a bicycle is ₹1080. It goes up by 5%. What is the new price (in ₹)?
  40. 40.The price of a bicycle is ₹2340. It goes up by 40%. What is the new price (in ₹)?

Answer key

  1. 47.5
  2. 5775
  3. 5278
  4. 989
  5. 56
  6. 9.75
  7. 3276
  8. 82
  9. 1652
  10. 5
  11. 2512
  12. 50
  13. 684
  14. 17
  15. 5
  16. 4536
  17. 384
  18. 2829
  19. 840
  20. 10
  21. 37
  22. 27.5
  23. 47
  24. 3289
  25. 55
  26. 4032
  27. 1332
  28. 72.5
  29. 10.25
  30. 1121
  31. 2090
  32. 44
  33. 32.5
  34. 5904
  35. 2703
  36. 43
  37. 50
  38. 50
  39. 1134
  40. 3276

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