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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 583 · 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 4800 litres. 40% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹4440 to ₹6216. By what percent did it go up?
  3. 3.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  4. 4.A town has 1480 people. Its population grows by 15%. How many people live there now?
  5. 5.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  6. 6.A water tank holds 2480 litres. 40% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹2100 to ₹2205. By what percent did it go up?
  8. 8.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  9. 9.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  10. 10.A water tank holds 1960 litres. 25% of the water is used. How many litres are left?
  11. 11.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  12. 12.A water tank holds 3940 litres. 20% of the water is used. How many litres are left?
  13. 13.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  14. 14.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  15. 15.A shop sells 1020 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  16. 16.A water tank holds 4560 litres. 30% of the water is used. How many litres are left?
  17. 17.A water tank holds 3300 litres. 10% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹1620 to ₹1458. By what percent did it come down?
  19. 19.A water tank holds 800 litres. 10% of the water is used. How many litres are left?
  20. 20.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹100 to ₹70. By what percent did it come down?
  22. 22.A shop sells 1720 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  23. 23.The price of a bicycle is ₹300. It goes up by 5%. What is the new price (in ₹)?
  24. 24.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹1720 to ₹1892. By what percent did it go up?
  26. 26.The price of a bicycle is ₹1280. It goes up by 5%. What is the new price (in ₹)?
  27. 27.A water tank holds 2500 litres. 25% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹4500 to ₹5850. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹4260 to ₹6390. By what percent did it go up?
  30. 30.A water tank holds 1520 litres. 20% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹4040 to ₹3838. By what percent did it come down?
  32. 32.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  33. 33.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 280 litres. 25% of the water is used. How many litres are left?
  35. 35.A town has 960 people. Its population grows by 15%. How many people live there now?
  36. 36.A water tank holds 520 litres. 25% of the water is used. How many litres are left?
  37. 37.A town has 4320 people. Its population grows by 25%. How many people live there now?
  38. 38.A town has 3820 people. Its population grows by 25%. How many people live there now?
  39. 39.A water tank holds 1760 litres. 10% of the water is used. How many litres are left?
  40. 40.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =

Answer key

  1. 2880
  2. 40
  3. 62.5
  4. 1702
  5. 32
  6. 1488
  7. 5
  8. 17
  9. 37
  10. 1470
  11. 36.25
  12. 3152
  13. 61
  14. 52.5
  15. 1173
  16. 3192
  17. 2970
  18. 10
  19. 720
  20. 65
  21. 30
  22. 1978
  23. 315
  24. 28
  25. 10
  26. 1344
  27. 1875
  28. 30
  29. 50
  30. 1216
  31. 5
  32. 20.75
  33. 110
  34. 210
  35. 1104
  36. 390
  37. 5400
  38. 4775
  39. 1584
  40. 51

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