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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 257 · 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 1480 litres. 15% of the water is used. How many litres are left?
  2. 2.A town has 640 people. Its population grows by 10%. How many people live there now?
  3. 3.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  4. 4.The price of a school bag changes from ₹4360 to ₹5014. By what percent did it go up?
  5. 5.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  6. 6.A town has 2760 people. Its population grows by 40%. How many people live there now?
  7. 7.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  8. 8.The price of a bicycle is ₹2540. It goes up by 10%. What is the new price (in ₹)?
  9. 9.A water tank holds 4860 litres. 15% of the water is used. How many litres are left?
  10. 10.A water tank holds 2720 litres. 10% of the water is used. How many litres are left?
  11. 11.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹3620 to ₹1810. By what percent did it come down?
  13. 13.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  14. 14.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  15. 15.A water tank holds 2400 litres. 25% of the water is used. How many litres are left?
  16. 16.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  17. 17.A water tank holds 2720 litres. 5% of the water is used. How many litres are left?
  18. 18.A town has 4660 people. Its population grows by 40%. How many people live there now?
  19. 19.A water tank holds 3840 litres. 50% of the water is used. How many litres are left?
  20. 20.The price of a bicycle is ₹1880. It goes up by 10%. What is the new price (in ₹)?
  21. 21.The price of a school bag changes from ₹3820 to ₹4202. By what percent did it go up?
  22. 22.A town has 2800 people. Its population grows by 50%. How many people live there now?
  23. 23.A water tank holds 1860 litres. 40% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹740 to ₹666. By what percent did it come down?
  25. 25.The price of a school bag changes from ₹500 to ₹575. By what percent did it go up?
  26. 26.A water tank holds 2100 litres. 5% of the water is used. How many litres are left?
  27. 27.A water tank holds 1140 litres. 50% of the water is used. How many litres are left?
  28. 28.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  29. 29.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹2080 to ₹1872. By what percent did it come down?
  31. 31.A water tank holds 1000 litres. 15% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹800 to ₹880. By what percent did it go up?
  33. 33.A water tank holds 1000 litres. 50% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹4260 to ₹2982. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹2140 to ₹2033. By what percent did it come down?
  36. 36.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  37. 37.A shop sells 120 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 ₹4620 to ₹6930. By what percent did it go up?
  39. 39.A water tank holds 2440 litres. 40% of the water is used. How many litres are left?
  40. 40.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 1258
  2. 704
  3. 33
  4. 15
  5. 3.5
  6. 3864
  7. 20.75
  8. 2794
  9. 4131
  10. 2448
  11. 33.5
  12. 50
  13. 49
  14. 2
  15. 1800
  16. 43
  17. 2584
  18. 6524
  19. 1920
  20. 2068
  21. 10
  22. 4200
  23. 1116
  24. 10
  25. 15
  26. 1995
  27. 570
  28. 31.25
  29. 26
  30. 10
  31. 850
  32. 10
  33. 500
  34. 30
  35. 5
  36. 96
  37. 144
  38. 50
  39. 1464
  40. 21

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