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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 754 · 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. 40% of the water is used. How many litres are left?
  2. 2.A water tank holds 3920 litres. 30% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹1460 to ₹1022. By what percent did it come down?
  4. 4.The price of a school bag changes from ₹4700 to ₹4230. By what percent did it come down?
  5. 5.The price of a school bag changes from ₹1340 to ₹1072. By what percent did it come down?
  6. 6.A water tank holds 1580 litres. 30% of the water is used. How many litres are left?
  7. 7.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  8. 8.A water tank holds 4460 litres. 50% of the water is used. How many litres are left?
  9. 9.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.The price of a school bag changes from ₹2560 to ₹1536. By what percent did it come down?
  11. 11.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹2020 to ₹1414. By what percent did it come down?
  13. 13.A water tank holds 1540 litres. 20% of the water is used. How many litres are left?
  14. 14.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  15. 15.A water tank holds 2520 litres. 50% of the water is used. How many litres are left?
  16. 16.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  17. 17.A town has 3640 people. Its population grows by 30%. How many people live there now?
  18. 18.A water tank holds 2060 litres. 50% of the water is used. How many litres are left?
  19. 19.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  20. 20.A shop sells 1040 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  21. 21.A town has 3020 people. Its population grows by 20%. How many people live there now?
  22. 22.A town has 760 people. Its population grows by 15%. How many people live there now?
  23. 23.A shop sells 4680 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  24. 24.A water tank holds 3540 litres. 40% of the water is used. How many litres are left?
  25. 25.A shop sells 820 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  26. 26.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  27. 27.The price of a bicycle is ₹4160. It goes up by 15%. What is the new price (in ₹)?
  28. 28.The price of a bicycle is ₹380. It goes up by 30%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹1420 to ₹1704. By what percent did it go up?
  30. 30.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹3340 to ₹3674. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹680 to ₹510. By what percent did it come down?
  33. 33.A water tank holds 4280 litres. 30% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹3620. It goes up by 25%. What is the new price (in ₹)?
  35. 35.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  36. 36.A town has 380 people. Its population grows by 25%. How many people live there now?
  37. 37.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  38. 38.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  39. 39.A water tank holds 3260 litres. 15% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹2420 to ₹2783. By what percent did it go up?

Answer key

  1. 240
  2. 2744
  3. 30
  4. 10
  5. 20
  6. 1106
  7. 32.5
  8. 2230
  9. 15.5
  10. 40
  11. 28
  12. 30
  13. 1232
  14. 28.75
  15. 1260
  16. 19
  17. 4732
  18. 1030
  19. 43
  20. 1352
  21. 3624
  22. 874
  23. 5850
  24. 2124
  25. 861
  26. 47.5
  27. 4784
  28. 494
  29. 20
  30. 68
  31. 10
  32. 25
  33. 2996
  34. 4525
  35. 80
  36. 475
  37. 57.5
  38. 57.5
  39. 2771
  40. 15

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