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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 802 · 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 price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  2. 2.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹600 to ₹660. By what percent did it go up?
  4. 4.The price of a bicycle is ₹1440. It goes up by 50%. What is the new price (in ₹)?
  5. 5.A shop sells 220 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  6. 6.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  7. 7.A town has 1800 people. Its population grows by 20%. How many people live there now?
  8. 8.The price of a school bag changes from ₹2880 to ₹2016. By what percent did it come down?
  9. 9.A water tank holds 1080 litres. 10% of the water is used. How many litres are left?
  10. 10.A shop sells 200 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  11. 11.A shop sells 3160 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  12. 12.The price of a bicycle is ₹4300. It goes up by 15%. What is the new price (in ₹)?
  13. 13.A shop sells 300 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  14. 14.The price of a bicycle is ₹800. It goes up by 10%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹3840 to ₹3072. By what percent did it come down?
  16. 16.A town has 2460 people. Its population grows by 25%. How many people live there now?
  17. 17.A water tank holds 1580 litres. 5% of the water is used. How many litres are left?
  18. 18.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  19. 19.A water tank holds 4080 litres. 5% of the water is used. How many litres are left?
  20. 20.The price of a bicycle is ₹2520. It goes up by 30%. What is the new price (in ₹)?
  21. 21.A water tank holds 3700 litres. 25% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹3000 to ₹3750. By what percent did it go up?
  23. 23.A town has 4300 people. Its population grows by 40%. How many people live there now?
  24. 24.The price of a bicycle is ₹2340. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A water tank holds 580 litres. 20% of the water is used. How many litres are left?
  26. 26.A water tank holds 4600 litres. 20% of the water is used. How many litres are left?
  27. 27.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  28. 28.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 1160 litres. 50% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹2980 to ₹2831. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹4780 to ₹4302. By what percent did it come down?
  32. 32.The price of a bicycle is ₹3700. It goes up by 30%. What is the new price (in ₹)?
  33. 33.A water tank holds 3060 litres. 50% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹540 to ₹513. By what percent did it come down?
  35. 35.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 3180 litres. 50% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹2340. It goes up by 5%. What is the new price (in ₹)?
  38. 38.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  39. 39.The price of a bicycle is ₹3660. It goes up by 5%. What is the new price (in ₹)?
  40. 40.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =

Answer key

  1. 49.5
  2. 28
  3. 10
  4. 2160
  5. 231
  6. 49.5
  7. 2160
  8. 30
  9. 972
  10. 210
  11. 4424
  12. 4945
  13. 315
  14. 880
  15. 20
  16. 3075
  17. 1501
  18. 28
  19. 3876
  20. 3276
  21. 2775
  22. 25
  23. 6020
  24. 2574
  25. 464
  26. 3680
  27. 40.5
  28. 37.5
  29. 580
  30. 5
  31. 10
  32. 4810
  33. 1530
  34. 5
  35. 32
  36. 1590
  37. 2457
  38. 19.25
  39. 3843
  40. 31.25

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