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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 610 · 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 3480 litres. 40% of the water is used. How many litres are left?
  2. 2.A shop sells 2000 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  3. 3.The price of a bicycle is ₹1960. It goes up by 10%. What is the new price (in ₹)?
  4. 4.A water tank holds 4560 litres. 15% of the water is used. How many litres are left?
  5. 5.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹1080 to ₹1512. By what percent did it go up?
  7. 7.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹2740 to ₹3014. By what percent did it go up?
  9. 9.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  10. 10.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹4860 to ₹5832. By what percent did it go up?
  12. 12.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  13. 13.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  14. 14.A town has 2540 people. Its population grows by 15%. How many people live there now?
  15. 15.A shop sells 1960 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  16. 16.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  17. 17.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  18. 18.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹1260 to ₹1134. By what percent did it come down?
  20. 20.A shop sells 2120 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  21. 21.A shop sells 2860 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  22. 22.A shop sells 4260 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹2940 to ₹2058. By what percent did it come down?
  24. 24.A town has 480 people. Its population grows by 40%. How many people live there now?
  25. 25.The price of a school bag changes from ₹980 to ₹1372. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹3120 to ₹3900. By what percent did it go up?
  27. 27.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  28. 28.The price of a school bag changes from ₹2040 to ₹1836. By what percent did it come down?
  29. 29.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  30. 30.The price of a bicycle is ₹4560. It goes up by 15%. What is the new price (in ₹)?
  31. 31.A water tank holds 4460 litres. 40% of the water is used. How many litres are left?
  32. 32.A water tank holds 640 litres. 20% of the water is used. How many litres are left?
  33. 33.A shop sells 680 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  34. 34.A water tank holds 240 litres. 20% of the water is used. How many litres are left?
  35. 35.A water tank holds 4200 litres. 20% of the water is used. How many litres are left?
  36. 36.A shop sells 4700 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  37. 37.A water tank holds 80 litres. 25% of the water is used. How many litres are left?
  38. 38.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  39. 39.A town has 1120 people. Its population grows by 5%. How many people live there now?
  40. 40.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =

Answer key

  1. 2088
  2. 2500
  3. 2156
  4. 3876
  5. 47.5
  6. 40
  7. 37.5
  8. 10
  9. 35
  10. 46
  11. 20
  12. 36
  13. 21
  14. 2921
  15. 2450
  16. 75
  17. 54
  18. 80
  19. 10
  20. 2332
  21. 4004
  22. 4473
  23. 30
  24. 672
  25. 40
  26. 25
  27. 14.5
  28. 10
  29. 23.5
  30. 5244
  31. 2676
  32. 512
  33. 748
  34. 192
  35. 3360
  36. 5405
  37. 60
  38. 52
  39. 1176
  40. 47

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