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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 380 · 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 1000 litres. 40% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹680. It goes up by 15%. What is the new price (in ₹)?
  3. 3.The price of a bicycle is ₹2080. It goes up by 10%. What is the new price (in ₹)?
  4. 4.A shop sells 1740 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹1000 to ₹500. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹920 to ₹644. By what percent did it come down?
  7. 7.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  8. 8.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  9. 9.The price of a school bag changes from ₹2340 to ₹2925. By what percent did it go up?
  10. 10.A water tank holds 500 litres. 50% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹3700 to ₹3885. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹4040 to ₹5656. By what percent did it go up?
  13. 13.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹3260 to ₹3912. By what percent did it go up?
  15. 15.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  16. 16.A water tank holds 3660 litres. 5% of the water is used. How many litres are left?
  17. 17.A town has 1880 people. Its population grows by 5%. How many people live there now?
  18. 18.A water tank holds 900 litres. 30% of the water is used. How many litres are left?
  19. 19.A shop sells 980 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  20. 20.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  21. 21.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  22. 22.A town has 1100 people. Its population grows by 5%. How many people live there now?
  23. 23.A shop sells 1780 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  24. 24.The price of a bicycle is ₹500. It goes up by 40%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹2360 to ₹3540. By what percent did it go up?
  26. 26.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  27. 27.A water tank holds 4860 litres. 20% of the water is used. How many litres are left?
  28. 28.A water tank holds 220 litres. 15% of the water is used. How many litres are left?
  29. 29.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  30. 30.A water tank holds 4400 litres. 5% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹4240 to ₹5300. By what percent did it go up?
  32. 32.The price of a bicycle is ₹2700. It goes up by 40%. What is the new price (in ₹)?
  33. 33.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹3700 to ₹4255. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹720 to ₹900. By what percent did it go up?
  36. 36.A water tank holds 940 litres. 40% of the water is used. How many litres are left?
  37. 37.A water tank holds 2160 litres. 10% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹380 to ₹361. By what percent did it come down?
  39. 39.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  40. 40.The price of a school bag changes from ₹3800 to ₹5700. By what percent did it go up?

Answer key

  1. 600
  2. 782
  3. 2288
  4. 2262
  5. 50
  6. 30
  7. 15.5
  8. 55
  9. 25
  10. 250
  11. 5
  12. 40
  13. 46
  14. 20
  15. 12.5
  16. 3477
  17. 1974
  18. 630
  19. 1127
  20. 47.5
  21. 9.75
  22. 1155
  23. 2047
  24. 700
  25. 50
  26. 38
  27. 3888
  28. 187
  29. 52.5
  30. 4180
  31. 25
  32. 3780
  33. 20.75
  34. 15
  35. 25
  36. 564
  37. 1944
  38. 5
  39. 36
  40. 50

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