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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 269 · 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 water tank holds 4440 litres. 20% of the water is used. How many litres are left?
  2. 2.A water tank holds 1520 litres. 5% of the water is used. How many litres are left?
  3. 3.A water tank holds 3960 litres. 15% of the water is used. How many litres are left?
  4. 4.A water tank holds 700 litres. 40% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹260. It goes up by 40%. What is the new price (in ₹)?
  6. 6.The price of a school bag changes from ₹260 to ₹338. By what percent did it go up?
  7. 7.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹3500 to ₹4025. By what percent did it go up?
  9. 9.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  10. 10.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  11. 11.The price of a bicycle is ₹600. It goes up by 5%. What is the new price (in ₹)?
  12. 12.The price of a bicycle is ₹4120. It goes up by 10%. What is the new price (in ₹)?
  13. 13.A water tank holds 2020 litres. 30% of the water is used. How many litres are left?
  14. 14.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹3380 to ₹3042. By what percent did it come down?
  16. 16.A water tank holds 900 litres. 30% of the water is used. How many litres are left?
  17. 17.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  18. 18.A water tank holds 880 litres. 50% of the water is used. How many litres are left?
  19. 19.A water tank holds 1060 litres. 5% of the water is used. How many litres are left?
  20. 20.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  21. 21.A shop sells 600 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹980 to ₹882. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹4640 to ₹2784. By what percent did it come down?
  24. 24.A town has 920 people. Its population grows by 40%. How many people live there now?
  25. 25.A water tank holds 4540 litres. 25% of the water is used. How many litres are left?
  26. 26.A water tank holds 760 litres. 20% of the water is used. How many litres are left?
  27. 27.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  28. 28.The price of a bicycle is ₹800. It goes up by 5%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹2200 to ₹2310. By what percent did it go up?
  30. 30.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  31. 31.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  32. 32.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  33. 33.A shop sells 1020 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  34. 34.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹120. It goes up by 50%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹3360 to ₹2856. By what percent did it come down?
  37. 37.A water tank holds 1260 litres. 50% of the water is used. How many litres are left?
  38. 38.A shop sells 5000 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  39. 39.A shop sells 3460 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  40. 40.A town has 3280 people. Its population grows by 5%. How many people live there now?

Answer key

  1. 3552
  2. 1444
  3. 3366
  4. 420
  5. 364
  6. 30
  7. 43
  8. 15
  9. 57.5
  10. 36.25
  11. 630
  12. 4532
  13. 1414
  14. 36.5
  15. 10
  16. 630
  17. 43
  18. 440
  19. 1007
  20. 56
  21. 660
  22. 10
  23. 40
  24. 1288
  25. 3405
  26. 608
  27. 19.25
  28. 840
  29. 5
  30. 50
  31. 55
  32. 55
  33. 1326
  34. 40.5
  35. 180
  36. 15
  37. 630
  38. 6250
  39. 5190
  40. 3444

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