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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 689 · 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 3080 litres. 50% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2740 to ₹2877. By what percent did it go up?
  3. 3.A water tank holds 3080 litres. 30% of the water is used. How many litres are left?
  4. 4.A water tank holds 640 litres. 20% of the water is used. How many litres are left?
  5. 5.A water tank holds 940 litres. 50% of the water is used. How many litres are left?
  6. 6.A water tank holds 3680 litres. 20% of the water is used. How many litres are left?
  7. 7.A shop sells 4640 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.The price of a school bag changes from ₹1040 to ₹520. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹1680 to ₹1596. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹320 to ₹336. By what percent did it go up?
  11. 11.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  12. 12.A water tank holds 1320 litres. 30% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2340 to ₹1170. By what percent did it come down?
  14. 14.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  15. 15.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹820 to ₹615. By what percent did it come down?
  17. 17.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  19. 19.A town has 3900 people. Its population grows by 50%. How many people live there now?
  20. 20.A water tank holds 3420 litres. 20% of the water is used. How many litres are left?
  21. 21.A water tank holds 760 litres. 10% of the water is used. How many litres are left?
  22. 22.A town has 2460 people. Its population grows by 20%. How many people live there now?
  23. 23.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  24. 24.A town has 1020 people. Its population grows by 50%. How many people live there now?
  25. 25.A water tank holds 3260 litres. 15% of the water is used. How many litres are left?
  26. 26.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  27. 27.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  28. 28.A shop sells 1860 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  29. 29.A water tank holds 1600 litres. 30% of the water is used. How many litres are left?
  30. 30.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  31. 31.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  32. 32.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  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.The price of a school bag changes from ₹1720 to ₹1462. By what percent did it come down?
  35. 35.The price of a bicycle is ₹560. It goes up by 40%. What is the new price (in ₹)?
  36. 36.A shop sells 3780 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  37. 37.A shop sells 800 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  38. 38.The price of a school bag changes from ₹720 to ₹936. By what percent did it go up?
  39. 39.The price of a bicycle is ₹1200. It goes up by 30%. What is the new price (in ₹)?
  40. 40.The price of a school bag changes from ₹4740 to ₹4029. By what percent did it come down?

Answer key

  1. 1540
  2. 5
  3. 2156
  4. 512
  5. 470
  6. 2944
  7. 4872
  8. 50
  9. 5
  10. 5
  11. 32.25
  12. 924
  13. 50
  14. 20.75
  15. 15.5
  16. 25
  17. 15.5
  18. 36.25
  19. 5850
  20. 2736
  21. 684
  22. 2952
  23. 19
  24. 1530
  25. 2771
  26. 57.5
  27. 43.75
  28. 2139
  29. 1120
  30. 52
  31. 21
  32. 52.5
  33. 40.5
  34. 15
  35. 784
  36. 3969
  37. 960
  38. 30
  39. 1560
  40. 15

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