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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 254 · 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.The price of a school bag changes from ₹1200 to ₹1080. By what percent did it come down?
  2. 2.A water tank holds 100 litres. 30% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹3740 to ₹2805. By what percent did it come down?
  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 ₹2300. It goes up by 40%. What is the new price (in ₹)?
  6. 6.A water tank holds 2660 litres. 15% of the water is used. How many litres are left?
  7. 7.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  8. 8.The price of a bicycle is ₹2620. It goes up by 40%. What is the new price (in ₹)?
  9. 9.A water tank holds 660 litres. 25% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1340 to ₹1206. By what percent did it come down?
  11. 11.A water tank holds 1800 litres. 50% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹4140. It goes up by 40%. What is the new price (in ₹)?
  13. 13.A water tank holds 420 litres. 30% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹4640 to ₹4408. By what percent did it come down?
  15. 15.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  16. 16.A water tank holds 1460 litres. 10% of the water is used. How many litres are left?
  17. 17.A town has 2620 people. Its population grows by 5%. How many people live there now?
  18. 18.The price of a school bag changes from ₹4680 to ₹3276. By what percent did it come down?
  19. 19.The price of a bicycle is ₹3940. It goes up by 25%. What is the new price (in ₹)?
  20. 20.A water tank holds 3500 litres. 40% of the water is used. How many litres are left?
  21. 21.A water tank holds 4020 litres. 30% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹4400 to ₹4840. By what percent did it go up?
  23. 23.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  25. 25.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹4160 to ₹4784. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹4680 to ₹2340. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹1560 to ₹1794. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹2800 to ₹2660. By what percent did it come down?
  30. 30.A water tank holds 3360 litres. 15% of the water is used. How many litres are left?
  31. 31.A shop sells 1400 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  32. 32.A water tank holds 3000 litres. 15% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1960 to ₹1764. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹780 to ₹897. By what percent did it go up?
  35. 35.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  36. 36.The price of a school bag changes from ₹560 to ₹476. By what percent did it come down?
  37. 37.The price of a bicycle is ₹780. It goes up by 20%. What is the new price (in ₹)?
  38. 38.The price of a school bag changes from ₹4980 to ₹2490. By what percent did it come down?
  39. 39.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  40. 40.A town has 3420 people. Its population grows by 40%. How many people live there now?

Answer key

  1. 10
  2. 70
  3. 25
  4. 27.75
  5. 3220
  6. 2261
  7. 60
  8. 3668
  9. 495
  10. 10
  11. 900
  12. 5796
  13. 294
  14. 5
  15. 72.5
  16. 1314
  17. 2751
  18. 30
  19. 4925
  20. 2100
  21. 2814
  22. 10
  23. 57.5
  24. 31.25
  25. 68
  26. 15
  27. 50
  28. 15
  29. 5
  30. 2856
  31. 1820
  32. 2550
  33. 10
  34. 15
  35. 23.5
  36. 15
  37. 936
  38. 50
  39. 32.5
  40. 4788

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