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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 820 · 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 25% and then goes up by 30% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 4900 litres. 25% of the water is used. How many litres are left?
  3. 3.A water tank holds 2920 litres. 20% of the water is used. How many litres are left?
  4. 4.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  5. 5.The price of a bicycle is ₹3440. It goes up by 50%. What is the new price (in ₹)?
  6. 6.The price of a school bag changes from ₹1880 to ₹1128. By what percent did it come down?
  7. 7.A water tank holds 3900 litres. 40% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹780 to ₹741. By what percent did it come down?
  9. 9.The price of a bicycle is ₹1360. It goes up by 10%. What is the new price (in ₹)?
  10. 10.The price of a bicycle is ₹1720. It goes up by 20%. What is the new price (in ₹)?
  11. 11.A water tank holds 4200 litres. 25% of the water is used. How many litres are left?
  12. 12.A water tank holds 120 litres. 50% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2040 to ₹2448. By what percent did it go up?
  14. 14.A water tank holds 80 litres. 10% of the water is used. How many litres are left?
  15. 15.A water tank holds 620 litres. 15% of the water is used. How many litres are left?
  16. 16.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  17. 17.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  18. 18.A water tank holds 3220 litres. 10% of the water is used. How many litres are left?
  19. 19.A water tank holds 2860 litres. 30% of the water is used. How many litres are left?
  20. 20.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  21. 21.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  22. 22.A shop sells 3460 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  23. 23.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹1020 to ₹969. By what percent did it come down?
  25. 25.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹1200 to ₹1140. By what percent did it come down?
  27. 27.A water tank holds 2300 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 10% more. By what percent has it gone up in all? =
  29. 29.A town has 4140 people. Its population grows by 5%. How many people live there now?
  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 15% and then comes down by 25% more. By what percent has it come down in all? =
  32. 32.A water tank holds 80 litres. 50% of the water is used. How many litres are left?
  33. 33.A shop sells 3000 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  34. 34.A water tank holds 260 litres. 50% of the water is used. How many litres are left?
  35. 35.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  36. 36.The price of a school bag changes from ₹1760 to ₹1848. By what percent did it go up?
  37. 37.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  38. 38.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  39. 39.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 600 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 62.5
  2. 3675
  3. 2336
  4. 27.75
  5. 5160
  6. 40
  7. 2340
  8. 5
  9. 1496
  10. 2064
  11. 3150
  12. 60
  13. 20
  14. 72
  15. 527
  16. 2
  17. 51
  18. 2898
  19. 2002
  20. 38
  21. 14
  22. 5190
  23. 70
  24. 5
  25. 18.75
  26. 5
  27. 2070
  28. 26.5
  29. 4347
  30. 37
  31. 36.25
  32. 40
  33. 3300
  34. 130
  35. 57.5
  36. 5
  37. 43
  38. 58
  39. 50
  40. 360

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