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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 16 · 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 town has 3500 people. Its population grows by 15%. How many people live there now?
  2. 2.A town has 4120 people. Its population grows by 50%. How many people live there now?
  3. 3.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  4. 4.A shop sells 4620 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 50% and then goes up by 40% more. By what percent has it gone up in all? =
  6. 6.A town has 2820 people. Its population grows by 40%. How many people live there now?
  7. 7.The price of a school bag changes from ₹1380 to ₹1173. By what percent did it come down?
  8. 8.A shop sells 1880 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.A water tank holds 1880 litres. 25% of the water is used. How many litres are left?
  10. 10.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹800 to ₹1120. By what percent did it go up?
  12. 12.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  13. 13.A shop sells 3760 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  14. 14.A town has 2300 people. Its population grows by 25%. How many people live there now?
  15. 15.A water tank holds 2360 litres. 15% of the water is used. How many litres are left?
  16. 16.A town has 3920 people. Its population grows by 5%. How many people live there now?
  17. 17.A water tank holds 2960 litres. 30% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹4500 to ₹4275. By what percent did it come down?
  19. 19.A shop sells 4440 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  21. 21.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹780 to ₹1170. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹1000 to ₹850. By what percent did it come down?
  24. 24.A water tank holds 320 litres. 15% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹2100. It goes up by 15%. What is the new price (in ₹)?
  26. 26.A water tank holds 380 litres. 10% of the water is used. How many litres are left?
  27. 27.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹4600 to ₹2760. By what percent did it come down?
  29. 29.A water tank holds 600 litres. 50% of the water is used. How many litres are left?
  30. 30.A shop sells 2660 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  31. 31.A water tank holds 1500 litres. 40% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹2500. It goes up by 25%. What is the new price (in ₹)?
  33. 33.A water tank holds 2680 litres. 50% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹2420 to ₹2662. By what percent did it go up?
  35. 35.The price of a bicycle is ₹2800. It goes up by 30%. What is the new price (in ₹)?
  36. 36.A shop sells 2740 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.The price of a bicycle is ₹240. It goes up by 10%. What is the new price (in ₹)?
  38. 38.A water tank holds 1760 litres. 5% of the water is used. How many litres are left?
  39. 39.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  40. 40.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =

Answer key

  1. 4025
  2. 6180
  3. 23.5
  4. 6468
  5. 110
  6. 3948
  7. 15
  8. 2632
  9. 1410
  10. 69
  11. 40
  12. 24
  13. 4324
  14. 2875
  15. 2006
  16. 4116
  17. 2072
  18. 5
  19. 4662
  20. 65
  21. 65
  22. 50
  23. 15
  24. 272
  25. 2415
  26. 342
  27. 33
  28. 40
  29. 300
  30. 3192
  31. 900
  32. 3125
  33. 1340
  34. 10
  35. 3640
  36. 3151
  37. 264
  38. 1672
  39. 75
  40. 95

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