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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 103 · 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 ₹3380 to ₹2704. By what percent did it come down?
  2. 2.A town has 3040 people. Its population grows by 50%. How many people live there now?
  3. 3.A town has 4700 people. Its population grows by 5%. How many people live there now?
  4. 4.A shop sells 100 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  5. 5.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  6. 6.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹1760 to ₹1496. By what percent did it come down?
  8. 8.A water tank holds 440 litres. 25% of the water is used. How many litres are left?
  9. 9.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  10. 10.A water tank holds 720 litres. 5% of the water is used. How many litres are left?
  11. 11.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹1580 to ₹1343. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹3660 to ₹4026. By what percent did it go up?
  14. 14.The price of a bicycle is ₹1040. It goes up by 25%. What is the new price (in ₹)?
  15. 15.A water tank holds 3860 litres. 50% of the water is used. How many litres are left?
  16. 16.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹3400 to ₹2720. By what percent did it come down?
  18. 18.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  19. 19.A shop sells 3860 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  20. 20.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  21. 21.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  22. 22.The price of a bicycle is ₹2780. It goes up by 15%. What is the new price (in ₹)?
  23. 23.A shop sells 1060 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹4100 to ₹3690. By what percent did it come down?
  25. 25.The price of a bicycle is ₹520. It goes up by 5%. What is the new price (in ₹)?
  26. 26.A town has 4280 people. Its population grows by 40%. How many people live there now?
  27. 27.A shop sells 4740 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  28. 28.A water tank holds 740 litres. 15% of the water is used. How many litres are left?
  29. 29.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  30. 30.A water tank holds 4520 litres. 15% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹140. It goes up by 10%. What is the new price (in ₹)?
  32. 32.A water tank holds 4880 litres. 50% of the water is used. How many litres are left?
  33. 33.A water tank holds 2420 litres. 20% of the water is used. How many litres are left?
  34. 34.A water tank holds 3060 litres. 10% of the water is used. How many litres are left?
  35. 35.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  36. 36.A town has 1400 people. Its population grows by 20%. How many people live there now?
  37. 37.The price of a school bag changes from ₹1060 to ₹1590. By what percent did it go up?
  38. 38.A town has 2120 people. Its population grows by 20%. How many people live there now?
  39. 39.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  40. 40.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =

Answer key

  1. 20
  2. 4560
  3. 4935
  4. 140
  5. 10.5
  6. 50
  7. 15
  8. 330
  9. 42.5
  10. 684
  11. 32.5
  12. 15
  13. 10
  14. 1300
  15. 1930
  16. 33.5
  17. 20
  18. 36.5
  19. 4825
  20. 18.75
  21. 19.25
  22. 3197
  23. 1113
  24. 10
  25. 546
  26. 5992
  27. 5688
  28. 629
  29. 43
  30. 3842
  31. 154
  32. 2440
  33. 1936
  34. 2754
  35. 15.5
  36. 1680
  37. 50
  38. 2544
  39. 57.5
  40. 24

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