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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 868 · 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 town has 3920 people. Its population grows by 15%. How many people live there now?
  2. 2.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 2980 litres. 20% of the water is used. How many litres are left?
  4. 4.A water tank holds 3920 litres. 30% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1700 to ₹2125. By what percent did it go up?
  6. 6.A water tank holds 820 litres. 5% of the water is used. How many litres are left?
  7. 7.A shop sells 740 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  8. 8.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  9. 9.The price of a bicycle is ₹4400. It goes up by 10%. What is the new price (in ₹)?
  10. 10.The price of a bicycle is ₹2660. It goes up by 20%. What is the new price (in ₹)?
  11. 11.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  12. 12.A town has 680 people. Its population grows by 10%. How many people live there now?
  13. 13.The price of a school bag changes from ₹200 to ₹250. By what percent did it go up?
  14. 14.A water tank holds 4880 litres. 50% of the water is used. How many litres are left?
  15. 15.A town has 4720 people. Its population grows by 15%. How many people live there now?
  16. 16.A water tank holds 3180 litres. 5% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹1140 to ₹1254. By what percent did it go up?
  18. 18.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  19. 19.The price of a school bag changes from ₹4980 to ₹2490. By what percent did it come down?
  20. 20.A town has 1720 people. Its population grows by 40%. How many people live there now?
  21. 21.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹200 to ₹210. By what percent did it go up?
  23. 23.A water tank holds 1340 litres. 5% of the water is used. How many litres are left?
  24. 24.A water tank holds 1700 litres. 5% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹2360 to ₹2242. By what percent did it come down?
  26. 26.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  27. 27.A water tank holds 4300 litres. 5% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹1320 to ₹1386. By what percent did it go up?
  29. 29.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  30. 30.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  31. 31.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  33. 33.The price of a bicycle is ₹1780. It goes up by 30%. What is the new price (in ₹)?
  34. 34.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  35. 35.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  36. 36.The price of a school bag changes from ₹1700 to ₹2210. By what percent did it go up?
  37. 37.A shop sells 300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  38. 38.The price of a school bag changes from ₹440 to ₹374. By what percent did it come down?
  39. 39.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  40. 40.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =

Answer key

  1. 4508
  2. 43
  3. 2384
  4. 2744
  5. 25
  6. 779
  7. 1110
  8. 31.25
  9. 4840
  10. 3192
  11. 23.5
  12. 748
  13. 25
  14. 2440
  15. 5428
  16. 3021
  17. 10
  18. 14.5
  19. 50
  20. 2408
  21. 68
  22. 5
  23. 1273
  24. 1615
  25. 5
  26. 37.5
  27. 4085
  28. 5
  29. 72.5
  30. 37
  31. 33.5
  32. 56.25
  33. 2314
  34. 47
  35. 55
  36. 30
  37. 360
  38. 15
  39. 49
  40. 55

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