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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 99 · 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.The price of a school bag changes from ₹3000 to ₹2850. By what percent did it come down?
  2. 2.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  3. 3.A water tank holds 2940 litres. 20% of the water is used. How many litres are left?
  4. 4.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  5. 5.The price of a school bag changes from ₹4620 to ₹4158. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹1440 to ₹1080. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹1100 to ₹1210. By what percent did it go up?
  8. 8.The price of a bicycle is ₹180. It goes up by 10%. What is the new price (in ₹)?
  9. 9.A town has 1740 people. Its population grows by 30%. How many people live there now?
  10. 10.The price of a school bag changes from ₹4980 to ₹4233. By what percent did it come down?
  11. 11.A water tank holds 100 litres. 5% of the water is used. How many litres are left?
  12. 12.A water tank holds 4120 litres. 20% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2640 to ₹3300. By what percent did it go up?
  14. 14.A water tank holds 3700 litres. 20% of the water is used. How many litres are left?
  15. 15.A water tank holds 4500 litres. 10% of the water is used. How many litres are left?
  16. 16.A shop sells 2600 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  17. 17.A water tank holds 2820 litres. 20% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹2520 to ₹1260. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹1620 to ₹1863. By what percent did it go up?
  20. 20.The price of a school bag changes from ₹3780 to ₹3024. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹4240 to ₹4028. By what percent did it come down?
  22. 22.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  23. 23.The price of a school bag changes from ₹100 to ₹125. By what percent did it go up?
  24. 24.A shop sells 4540 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  25. 25.A water tank holds 4740 litres. 25% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹580. It goes up by 15%. What is the new price (in ₹)?
  27. 27.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  29. 29.A water tank holds 1500 litres. 20% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹1240. It goes up by 40%. What is the new price (in ₹)?
  31. 31.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  32. 32.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹4200 to ₹2940. By what percent did it come down?
  34. 34.The price of a bicycle is ₹680. It goes up by 50%. What is the new price (in ₹)?
  35. 35.A water tank holds 900 litres. 25% of the water is used. How many litres are left?
  36. 36.A shop sells 2340 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  37. 37.A water tank holds 260 litres. 30% of the water is used. How many litres are left?
  38. 38.A town has 580 people. Its population grows by 20%. How many people live there now?
  39. 39.A water tank holds 3520 litres. 15% of the water is used. How many litres are left?
  40. 40.A water tank holds 1620 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 5
  2. 14.5
  3. 2352
  4. 33.5
  5. 10
  6. 25
  7. 10
  8. 198
  9. 2262
  10. 15
  11. 95
  12. 3296
  13. 25
  14. 2960
  15. 4050
  16. 3640
  17. 2256
  18. 50
  19. 15
  20. 20
  21. 5
  22. 28.75
  23. 25
  24. 4767
  25. 3555
  26. 667
  27. 110
  28. 5
  29. 1200
  30. 1736
  31. 15.5
  32. 33
  33. 30
  34. 1020
  35. 675
  36. 3042
  37. 182
  38. 696
  39. 2992
  40. 1539

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