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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 378 · 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 5% and then comes down by 15% more. By what percent has it come down in all? =
  2. 2.A water tank holds 1420 litres. 50% of the water is used. How many litres are left?
  3. 3.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  4. 4.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  5. 5.A shop sells 1520 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  6. 6.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  7. 7.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  8. 8.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  9. 9.A town has 140 people. Its population grows by 5%. How many people live there now?
  10. 10.A water tank holds 3980 litres. 40% of the water is used. How many litres are left?
  11. 11.A town has 920 people. Its population grows by 10%. How many people live there now?
  12. 12.A water tank holds 1000 litres. 5% of the water is used. How many litres are left?
  13. 13.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  14. 14.A water tank holds 2820 litres. 20% of the water is used. How many litres are left?
  15. 15.The price of a bicycle is ₹740. It goes up by 20%. What is the new price (in ₹)?
  16. 16.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹3540 to ₹4425. By what percent did it go up?
  18. 18.A water tank holds 1700 litres. 5% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹520 to ₹598. By what percent did it go up?
  20. 20.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  21. 21.A water tank holds 900 litres. 20% of the water is used. How many litres are left?
  22. 22.A shop sells 3360 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  23. 23.A water tank holds 1420 litres. 10% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹680 to ₹816. By what percent did it go up?
  25. 25.A water tank holds 60 litres. 40% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹380. It goes up by 5%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹2740 to ₹3288. By what percent did it go up?
  28. 28.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  29. 29.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  30. 30.A water tank holds 740 litres. 40% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹600 to ₹750. By what percent did it go up?
  32. 32.The price of a bicycle is ₹2520. It goes up by 20%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹1020 to ₹1530. By what percent did it go up?
  34. 34.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  35. 35.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 2780 litres. 20% of the water is used. How many litres are left?
  37. 37.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  38. 38.A town has 2080 people. Its population grows by 25%. How many people live there now?
  39. 39.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  40. 40.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 19.25
  2. 710
  3. 31.25
  4. 57.5
  5. 1748
  6. 68
  7. 28
  8. 47.5
  9. 147
  10. 2388
  11. 1012
  12. 950
  13. 23.5
  14. 2256
  15. 888
  16. 10.25
  17. 25
  18. 1615
  19. 15
  20. 42.5
  21. 720
  22. 3864
  23. 1278
  24. 20
  25. 36
  26. 399
  27. 20
  28. 14.5
  29. 37.5
  30. 444
  31. 25
  32. 3024
  33. 50
  34. 32
  35. 50
  36. 2224
  37. 55
  38. 2600
  39. 18.75
  40. 54

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