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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 524 · 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 town has 3860 people. Its population grows by 5%. How many people live there now?
  2. 2.The price of a school bag changes from ₹1000 to ₹850. By what percent did it come down?
  3. 3.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  4. 4.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  5. 5.A water tank holds 3720 litres. 10% of the water is used. How many litres are left?
  6. 6.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  7. 7.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  8. 8.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  9. 9.The price of a bicycle is ₹1140. It goes up by 30%. What is the new price (in ₹)?
  10. 10.The price of a school bag changes from ₹1320 to ₹1716. By what percent did it go up?
  11. 11.A town has 4100 people. Its population grows by 10%. How many people live there now?
  12. 12.A town has 3900 people. Its population grows by 5%. How many people live there now?
  13. 13.The price of a school bag changes from ₹2960 to ₹4144. By what percent did it go up?
  14. 14.A shop sells 2340 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  15. 15.The price of a bicycle is ₹3920. It goes up by 20%. What is the new price (in ₹)?
  16. 16.A water tank holds 2560 litres. 15% of the water is used. How many litres are left?
  17. 17.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  18. 18.A town has 660 people. Its population grows by 30%. How many people live there now?
  19. 19.A water tank holds 4860 litres. 15% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹2520 to ₹2016. By what percent did it come down?
  21. 21.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  22. 22.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  23. 23.The price of a bicycle is ₹4240. It goes up by 20%. What is the new price (in ₹)?
  24. 24.A water tank holds 2240 litres. 50% of the water is used. How many litres are left?
  25. 25.A water tank holds 1820 litres. 20% of the water is used. How many litres are left?
  26. 26.A town has 3240 people. Its population grows by 20%. How many people live there now?
  27. 27.A water tank holds 660 litres. 25% of the water is used. How many litres are left?
  28. 28.A water tank holds 960 litres. 10% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹4020. It goes up by 30%. What is the new price (in ₹)?
  30. 30.A water tank holds 3400 litres. 15% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹600 to ₹750. By what percent did it go up?
  32. 32.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  33. 33.The price of a bicycle is ₹840. It goes up by 25%. What is the new price (in ₹)?
  34. 34.The price of a bicycle is ₹4800. It goes up by 10%. What is the new price (in ₹)?
  35. 35.A water tank holds 1260 litres. 5% of the water is used. How many litres are left?
  36. 36.A water tank holds 1500 litres. 25% of the water is used. How many litres are left?
  37. 37.A water tank holds 2600 litres. 30% of the water is used. How many litres are left?
  38. 38.A water tank holds 3040 litres. 5% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹1580 to ₹1264. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹3040 to ₹3192. By what percent did it go up?

Answer key

  1. 4053
  2. 15
  3. 80
  4. 32.5
  5. 3348
  6. 57.5
  7. 32
  8. 47
  9. 1482
  10. 30
  11. 4510
  12. 4095
  13. 40
  14. 2925
  15. 4704
  16. 2176
  17. 3.5
  18. 858
  19. 4131
  20. 20
  21. 57.5
  22. 60
  23. 5088
  24. 1120
  25. 1456
  26. 3888
  27. 495
  28. 864
  29. 5226
  30. 2890
  31. 25
  32. 38
  33. 1050
  34. 5280
  35. 1197
  36. 1125
  37. 1820
  38. 2888
  39. 20
  40. 5

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