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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 518 · 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 10% and then comes down by 25% more. By what percent has it come down in all? =
  2. 2.The price of a bicycle is ₹4120. It goes up by 5%. What is the new price (in ₹)?
  3. 3.The price of a bicycle is ₹4980. It goes up by 20%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹2980 to ₹3129. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹2180 to ₹1744. By what percent did it come down?
  6. 6.A water tank holds 2840 litres. 25% of the water is used. How many litres are left?
  7. 7.A water tank holds 3740 litres. 50% of the water is used. How many litres are left?
  8. 8.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  9. 9.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 860 litres. 20% of the water is used. How many litres are left?
  11. 11.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  12. 12.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹4980 to ₹5478. By what percent did it go up?
  14. 14.A shop sells 160 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹140 to ₹154. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹560 to ₹700. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹860 to ₹1032. By what percent did it go up?
  18. 18.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  19. 19.The price of a bicycle is ₹4520. It goes up by 10%. What is the new price (in ₹)?
  20. 20.A town has 3580 people. Its population grows by 30%. How many people live there now?
  21. 21.A town has 2520 people. Its population grows by 5%. How many people live there now?
  22. 22.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  23. 23.A shop sells 3420 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  24. 24.A water tank holds 4560 litres. 25% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹3380. It goes up by 25%. What is the new price (in ₹)?
  26. 26.A water tank holds 3040 litres. 15% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹4360 to ₹5668. By what percent did it go up?
  28. 28.The price of a school bag changes from ₹3420 to ₹3762. By what percent did it go up?
  29. 29.A shop sells 2720 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹760 to ₹722. By what percent did it come down?
  31. 31.A water tank holds 4920 litres. 5% of the water is used. How many litres are left?
  32. 32.A water tank holds 2740 litres. 10% of the water is used. How many litres are left?
  33. 33.A water tank holds 1160 litres. 20% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹3660 to ₹4026. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹340 to ₹442. By what percent did it go up?
  36. 36.A water tank holds 3320 litres. 30% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹200 to ₹300. By what percent did it go up?
  38. 38.The price of a bicycle is ₹4900. It goes up by 20%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹2440 to ₹2928. By what percent did it go up?
  40. 40.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =

Answer key

  1. 32.5
  2. 4326
  3. 5976
  4. 5
  5. 20
  6. 2130
  7. 1870
  8. 40
  9. 31.25
  10. 688
  11. 70
  12. 12.5
  13. 10
  14. 168
  15. 10
  16. 25
  17. 20
  18. 47.5
  19. 4972
  20. 4654
  21. 2646
  22. 52.5
  23. 3762
  24. 3420
  25. 4225
  26. 2584
  27. 30
  28. 10
  29. 3400
  30. 5
  31. 4674
  32. 2466
  33. 928
  34. 10
  35. 30
  36. 2324
  37. 50
  38. 5880
  39. 20
  40. 43

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