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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 222 · 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 3680 litres. 40% of the water is used. How many litres are left?
  2. 2.A water tank holds 3040 litres. 30% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹940 to ₹799. By what percent did it come down?
  4. 4.A water tank holds 2420 litres. 50% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1400 to ₹1120. By what percent did it come down?
  6. 6.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  7. 7.The price of a school bag changes from ₹3880 to ₹1940. By what percent did it come down?
  8. 8.The price of a bicycle is ₹1020. It goes up by 10%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹4360 to ₹2180. By what percent did it come down?
  10. 10.A water tank holds 3680 litres. 30% of the water is used. How many litres are left?
  11. 11.A water tank holds 360 litres. 5% of the water is used. How many litres are left?
  12. 12.A water tank holds 340 litres. 5% of the water is used. How many litres are left?
  13. 13.A shop sells 3660 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  14. 14.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  15. 15.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  16. 16.The price of a bicycle is ₹1240. It goes up by 25%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹3940 to ₹3152. By what percent did it come down?
  18. 18.A water tank holds 4220 litres. 5% of the water is used. How many litres are left?
  19. 19.A water tank holds 3200 litres. 25% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹4480 to ₹5824. By what percent did it go up?
  21. 21.A water tank holds 3740 litres. 10% of the water is used. How many litres are left?
  22. 22.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  23. 23.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  24. 24.A town has 2980 people. Its population grows by 20%. How many people live there now?
  25. 25.The price of a school bag changes from ₹960 to ₹864. By what percent did it come down?
  26. 26.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  27. 27.A town has 4840 people. Its population grows by 5%. How many people live there now?
  28. 28.A shop sells 200 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹1880 to ₹2068. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹3400 to ₹4760. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹3460 to ₹3633. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹1280 to ₹1088. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹3340 to ₹3006. By what percent did it come down?
  34. 34.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  35. 35.A shop sells 2300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  36. 36.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 1940 litres. 10% of the water is used. How many litres are left?
  38. 38.A town has 3620 people. Its population grows by 40%. How many people live there now?
  39. 39.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 2208
  2. 2128
  3. 15
  4. 1210
  5. 20
  6. 49
  7. 50
  8. 1122
  9. 50
  10. 2576
  11. 342
  12. 323
  13. 3843
  14. 28.75
  15. 61
  16. 1550
  17. 20
  18. 4009
  19. 2400
  20. 30
  21. 3366
  22. 33.5
  23. 5
  24. 3576
  25. 10
  26. 26
  27. 5082
  28. 260
  29. 10
  30. 40
  31. 5
  32. 15
  33. 10
  34. 72.5
  35. 2760
  36. 31.25
  37. 1746
  38. 5068
  39. 68
  40. 40

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