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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 544 · 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 40% and then goes up by 10% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 900 litres. 10% of the water is used. How many litres are left?
  3. 3.A water tank holds 3260 litres. 15% of the water is used. How many litres are left?
  4. 4.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  5. 5.A town has 4300 people. Its population grows by 10%. How many people live there now?
  6. 6.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  7. 7.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  8. 8.The price of a bicycle is ₹440. It goes up by 20%. What is the new price (in ₹)?
  9. 9.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  10. 10.A water tank holds 2800 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹320 to ₹288. By what percent did it come down?
  12. 12.A town has 1220 people. Its population grows by 5%. How many people live there now?
  13. 13.A water tank holds 1640 litres. 50% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹3500 to ₹2625. By what percent did it come down?
  15. 15.A town has 1140 people. Its population grows by 20%. How many people live there now?
  16. 16.The price of a school bag changes from ₹4580 to ₹5496. By what percent did it go up?
  17. 17.The price of a bicycle is ₹1540. It goes up by 10%. What is the new price (in ₹)?
  18. 18.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹3640. It goes up by 40%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹1840 to ₹1932. By what percent did it go up?
  21. 21.A shop sells 1480 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹3140 to ₹3768. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹1380 to ₹1173. By what percent did it come down?
  24. 24.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  25. 25.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹2860 to ₹3718. By what percent did it go up?
  27. 27.A shop sells 2520 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  28. 28.The price of a bicycle is ₹1940. It goes up by 30%. What is the new price (in ₹)?
  29. 29.A water tank holds 2920 litres. 20% of the water is used. How many litres are left?
  30. 30.A shop sells 2800 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  31. 31.The price of a bicycle is ₹1720. It goes up by 15%. What is the new price (in ₹)?
  32. 32.A town has 4300 people. Its population grows by 25%. How many people live there now?
  33. 33.A water tank holds 60 litres. 30% of the water is used. How many litres are left?
  34. 34.A water tank holds 2460 litres. 25% of the water is used. How many litres are left?
  35. 35.A town has 460 people. Its population grows by 10%. How many people live there now?
  36. 36.A water tank holds 1940 litres. 25% of the water is used. How many litres are left?
  37. 37.A water tank holds 180 litres. 20% of the water is used. How many litres are left?
  38. 38.A shop sells 1300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  39. 39.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  40. 40.The price of a school bag changes from ₹940 to ₹564. By what percent did it come down?

Answer key

  1. 54
  2. 810
  3. 2771
  4. 75
  5. 4730
  6. 38
  7. 80
  8. 528
  9. 58
  10. 2100
  11. 10
  12. 1281
  13. 820
  14. 25
  15. 1368
  16. 20
  17. 1694
  18. 69
  19. 5096
  20. 5
  21. 1850
  22. 20
  23. 15
  24. 60
  25. 15.5
  26. 30
  27. 2646
  28. 2522
  29. 2336
  30. 3360
  31. 1978
  32. 5375
  33. 42
  34. 1845
  35. 506
  36. 1455
  37. 144
  38. 1690
  39. 57.5
  40. 40

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