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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 536 · 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.

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  1. 1.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  2. 2.A town has 4180 people. Its population grows by 25%. How many people live there now?
  3. 3.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  4. 4.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  5. 5.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 1700 litres. 5% of the water is used. How many litres are left?
  7. 7.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 4600 litres. 50% of the water is used. How many litres are left?
  9. 9.The price of a bicycle is ₹240. It goes up by 10%. What is the new price (in ₹)?
  10. 10.The price of a bicycle is ₹5000. It goes up by 40%. What is the new price (in ₹)?
  11. 11.A water tank holds 4320 litres. 30% of the water is used. How many litres are left?
  12. 12.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  13. 13.A water tank holds 3540 litres. 30% of the water is used. How many litres are left?
  14. 14.A water tank holds 4800 litres. 10% of the water is used. How many litres are left?
  15. 15.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  16. 16.A water tank holds 4120 litres. 5% of the water is used. How many litres are left?
  17. 17.A water tank holds 2960 litres. 5% of the water is used. How many litres are left?
  18. 18.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  19. 19.A water tank holds 1300 litres. 40% of the water is used. How many litres are left?
  20. 20.The price of a bicycle is ₹4800. It goes up by 25%. What is the new price (in ₹)?
  21. 21.The price of a school bag changes from ₹2700 to ₹2295. By what percent did it come down?
  22. 22.The price of a bicycle is ₹3220. It goes up by 5%. What is the new price (in ₹)?
  23. 23.A water tank holds 1480 litres. 30% of the water is used. How many litres are left?
  24. 24.A shop sells 1360 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  25. 25.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.A water tank holds 4780 litres. 15% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹2960. It goes up by 10%. What is the new price (in ₹)?
  28. 28.A town has 1400 people. Its population grows by 25%. How many people live there now?
  29. 29.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹960 to ₹768. By what percent did it come down?
  31. 31.A town has 4960 people. Its population grows by 10%. How many people live there now?
  32. 32.A town has 3580 people. Its population grows by 5%. How many people live there now?
  33. 33.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  34. 34.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  35. 35.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  36. 36.A shop sells 1460 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  37. 37.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹3140 to ₹4710. By what percent did it go up?
  39. 39.The price of a bicycle is ₹2520. It goes up by 50%. What is the new price (in ₹)?
  40. 40.A shop sells 680 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?

Answer key

  1. 87.5
  2. 5225
  3. 47.5
  4. 27.5
  5. 32
  6. 1615
  7. 62.5
  8. 2300
  9. 264
  10. 7000
  11. 3024
  12. 55
  13. 2478
  14. 4320
  15. 26
  16. 3914
  17. 2812
  18. 33.5
  19. 780
  20. 6000
  21. 15
  22. 3381
  23. 1036
  24. 1564
  25. 54
  26. 4063
  27. 3256
  28. 1750
  29. 5
  30. 20
  31. 5456
  32. 3759
  33. 14.5
  34. 43
  35. 32.5
  36. 1533
  37. 36.5
  38. 50
  39. 3780
  40. 1020

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