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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 132 · 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 comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  2. 2.A water tank holds 380 litres. 5% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2140 to ₹2675. By what percent did it go up?
  4. 4.A water tank holds 5000 litres. 10% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1600 to ₹800. By what percent did it come down?
  6. 6.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  7. 7.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹1040 to ₹1196. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹360 to ₹252. By what percent did it come down?
  10. 10.A water tank holds 4800 litres. 10% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹2800 to ₹4200. By what percent did it go up?
  12. 12.A town has 80 people. Its population grows by 25%. How many people live there now?
  13. 13.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹1340 to ₹1072. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹2740 to ₹2192. By what percent did it come down?
  16. 16.A town has 2940 people. Its population grows by 30%. How many people live there now?
  17. 17.The price of a school bag changes from ₹520 to ₹312. By what percent did it come down?
  18. 18.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  19. 19.The price of a bicycle is ₹1740. It goes up by 25%. What is the new price (in ₹)?
  20. 20.A town has 3600 people. Its population grows by 5%. How many people live there now?
  21. 21.A water tank holds 1600 litres. 15% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹600 to ₹630. By what percent did it go up?
  23. 23.A water tank holds 2700 litres. 40% of the water is used. How many litres are left?
  24. 24.A water tank holds 2280 litres. 5% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹4760 to ₹7140. By what percent did it go up?
  26. 26.A town has 1260 people. Its population grows by 25%. How many people live there now?
  27. 27.A water tank holds 2380 litres. 40% of the water is used. How many litres are left?
  28. 28.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  29. 29.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  30. 30.A water tank holds 3540 litres. 20% of the water is used. How many litres are left?
  31. 31.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  32. 32.A water tank holds 3880 litres. 15% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1740 to ₹1566. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹4200 to ₹5040. By what percent did it go up?
  35. 35.A shop sells 2680 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹4040 to ₹3636. By what percent did it come down?
  38. 38.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  39. 39.A shop sells 4680 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  40. 40.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =

Answer key

  1. 36.25
  2. 361
  3. 25
  4. 4500
  5. 50
  6. 23.5
  7. 68
  8. 15
  9. 30
  10. 4320
  11. 50
  12. 100
  13. 60
  14. 20
  15. 20
  16. 3822
  17. 40
  18. 40.5
  19. 2175
  20. 3780
  21. 1360
  22. 5
  23. 1620
  24. 2166
  25. 50
  26. 1575
  27. 1428
  28. 31.25
  29. 33.5
  30. 2832
  31. 37
  32. 3298
  33. 10
  34. 20
  35. 3082
  36. 64
  37. 10
  38. 4.5
  39. 5148
  40. 50

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