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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 562 · 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 water tank holds 400 litres. 10% of the water is used. How many litres are left?
  2. 2.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  4. 4.A town has 1720 people. Its population grows by 10%. How many people live there now?
  5. 5.A water tank holds 700 litres. 15% of the water is used. How many litres are left?
  6. 6.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 1780 litres. 50% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹100 to ₹125. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹700 to ₹840. By what percent did it go up?
  10. 10.The price of a bicycle is ₹3580. It goes up by 10%. What is the new price (in ₹)?
  11. 11.A water tank holds 1220 litres. 30% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹3680 to ₹5520. By what percent did it go up?
  13. 13.The price of a bicycle is ₹3780. It goes up by 15%. What is the new price (in ₹)?
  14. 14.The price of a bicycle is ₹2280. It goes up by 25%. What is the new price (in ₹)?
  15. 15.A shop sells 4680 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  16. 16.A water tank holds 1000 litres. 50% of the water is used. How many litres are left?
  17. 17.A water tank holds 2040 litres. 10% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹4860 to ₹4131. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹4300 to ₹4945. By what percent did it go up?
  20. 20.The price of a bicycle is ₹2340. It goes up by 15%. What is the new price (in ₹)?
  21. 21.A water tank holds 4720 litres. 10% of the water is used. How many litres are left?
  22. 22.The price of a bicycle is ₹1060. It goes up by 10%. What is the new price (in ₹)?
  23. 23.The price of a bicycle is ₹2820. It goes up by 20%. What is the new price (in ₹)?
  24. 24.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.The price of a bicycle is ₹2000. It goes up by 10%. What is the new price (in ₹)?
  26. 26.A water tank holds 200 litres. 15% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹2280 to ₹2052. By what percent did it come down?
  28. 28.A town has 3340 people. Its population grows by 40%. How many people live there now?
  29. 29.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹1260 to ₹1008. By what percent did it come down?
  31. 31.The price of a bicycle is ₹1760. It goes up by 30%. What is the new price (in ₹)?
  32. 32.The price of a bicycle is ₹4040. It goes up by 15%. What is the new price (in ₹)?
  33. 33.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  34. 34.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  35. 35.A water tank holds 440 litres. 5% of the water is used. How many litres are left?
  36. 36.A water tank holds 1220 litres. 10% of the water is used. How many litres are left?
  37. 37.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  38. 38.A town has 1220 people. Its population grows by 10%. How many people live there now?
  39. 39.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹580 to ₹435. By what percent did it come down?

Answer key

  1. 360
  2. 43.75
  3. 56
  4. 1892
  5. 595
  6. 82
  7. 890
  8. 25
  9. 20
  10. 3938
  11. 854
  12. 50
  13. 4347
  14. 2850
  15. 4914
  16. 500
  17. 1836
  18. 15
  19. 15
  20. 2691
  21. 4248
  22. 1166
  23. 3384
  24. 14.5
  25. 2200
  26. 170
  27. 10
  28. 4676
  29. 96
  30. 20
  31. 2288
  32. 4646
  33. 40.5
  34. 54
  35. 418
  36. 1098
  37. 43.75
  38. 1342
  39. 15.5
  40. 25

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