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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 890 · 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 760 litres. 40% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹3440 to ₹3612. By what percent did it go up?
  3. 3.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  4. 4.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  5. 5.A shop sells 940 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  6. 6.A town has 900 people. Its population grows by 20%. How many people live there now?
  7. 7.A town has 2280 people. Its population grows by 5%. How many people live there now?
  8. 8.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  9. 9.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹4720 to ₹4248. By what percent did it come down?
  11. 11.A shop sells 240 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  12. 12.A water tank holds 480 litres. 50% of the water is used. How many litres are left?
  13. 13.A town has 3280 people. Its population grows by 5%. How many people live there now?
  14. 14.The price of a bicycle is ₹4260. It goes up by 10%. What is the new price (in ₹)?
  15. 15.A shop sells 1440 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  16. 16.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  17. 17.A water tank holds 3400 litres. 40% of the water is used. How many litres are left?
  18. 18.A town has 3740 people. Its population grows by 40%. How many people live there now?
  19. 19.The price of a school bag changes from ₹2860 to ₹2574. By what percent did it come down?
  20. 20.A water tank holds 2720 litres. 15% of the water is used. How many litres are left?
  21. 21.A town has 1980 people. Its population grows by 40%. How many people live there now?
  22. 22.A shop sells 4700 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  23. 23.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹1420 to ₹1207. By what percent did it come down?
  25. 25.A shop sells 960 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  26. 26.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  27. 27.A water tank holds 2880 litres. 5% of the water is used. How many litres are left?
  28. 28.A water tank holds 3820 litres. 5% of the water is used. How many litres are left?
  29. 29.A shop sells 4140 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹940 to ₹752. By what percent did it come down?
  31. 31.The price of a bicycle is ₹4680. It goes up by 50%. What is the new price (in ₹)?
  32. 32.A shop sells 500 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  33. 33.A water tank holds 2040 litres. 20% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹4920 to ₹4674. By what percent did it come down?
  35. 35.A water tank holds 340 litres. 25% of the water is used. How many litres are left?
  36. 36.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  37. 37.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹3200 to ₹3360. By what percent did it go up?
  39. 39.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  40. 40.A water tank holds 4520 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 456
  2. 5
  3. 56.25
  4. 70
  5. 1128
  6. 1080
  7. 2394
  8. 57.5
  9. 27.75
  10. 10
  11. 360
  12. 240
  13. 3444
  14. 4686
  15. 1872
  16. 28.75
  17. 2040
  18. 5236
  19. 10
  20. 2312
  21. 2772
  22. 5405
  23. 58
  24. 15
  25. 1056
  26. 32.25
  27. 2736
  28. 3629
  29. 4968
  30. 20
  31. 7020
  32. 600
  33. 1632
  34. 5
  35. 255
  36. 3.5
  37. 12
  38. 5
  39. 42.5
  40. 2260

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