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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 931 · 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 2880 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹3200. It goes up by 25%. What is the new price (in ₹)?
  3. 3.A water tank holds 2080 litres. 15% of the water is used. How many litres are left?
  4. 4.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  5. 5.A shop sells 3740 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  6. 6.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  7. 7.A shop sells 4220 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  8. 8.The price of a bicycle is ₹2480. It goes up by 15%. What is the new price (in ₹)?
  9. 9.A water tank holds 2980 litres. 20% of the water is used. How many litres are left?
  10. 10.A town has 940 people. Its population grows by 15%. How many people live there now?
  11. 11.The price of a bicycle is ₹880. It goes up by 25%. What is the new price (in ₹)?
  12. 12.The price of a bicycle is ₹2400. It goes up by 40%. What is the new price (in ₹)?
  13. 13.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  14. 14.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹4600. It goes up by 30%. What is the new price (in ₹)?
  16. 16.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  17. 17.A shop sells 1920 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  18. 18.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  19. 19.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹1240 to ₹1426. By what percent did it go up?
  21. 21.A water tank holds 780 litres. 25% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹1420 to ₹852. By what percent did it come down?
  23. 23.A water tank holds 2860 litres. 5% of the water is used. How many litres are left?
  24. 24.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹4000 to ₹2800. By what percent did it come down?
  26. 26.A water tank holds 440 litres. 15% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹1800 to ₹1710. By what percent did it come down?
  28. 28.A town has 740 people. Its population grows by 50%. How many people live there now?
  29. 29.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  30. 30.A town has 1080 people. Its population grows by 10%. How many people live there now?
  31. 31.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  32. 32.A water tank holds 1040 litres. 30% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹4360 to ₹4796. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹3980 to ₹5970. By what percent did it go up?
  35. 35.The price of a bicycle is ₹1960. It goes up by 10%. What is the new price (in ₹)?
  36. 36.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  37. 37.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 340 litres. 5% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹2840 to ₹2982. By what percent did it go up?
  40. 40.A shop sells 3880 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?

Answer key

  1. 2304
  2. 4000
  3. 1768
  4. 95
  5. 4114
  6. 110
  7. 5908
  8. 2852
  9. 2384
  10. 1081
  11. 1100
  12. 3360
  13. 70
  14. 32
  15. 5980
  16. 82
  17. 2880
  18. 9.25
  19. 26
  20. 15
  21. 585
  22. 40
  23. 2717
  24. 96
  25. 30
  26. 374
  27. 5
  28. 1110
  29. 33.5
  30. 1188
  31. 51
  32. 728
  33. 10
  34. 50
  35. 2156
  36. 72.5
  37. 43.75
  38. 323
  39. 5
  40. 4074

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