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Add or Subtract a Percentage

How to add a percentage to a number - Step by Step

To add a percentage (%) to a number, i.e., If you want to add a y percent to an x amount, you can use the following formula:

End Value = x + (( y / 100) * x )

Where: x represents the start or inicial value and y the percent we want to add. See the example below:

How to increase or add 10% to 100?

Plugging the values in the formula above:

End Value = 100 + (( 10 / 100 ) x 100)

End Value = 100 + (( 0.1 ) x 100 )

End Value = 100 + ( 10 )

End Value = 110 (Answer).

How to subtract a percentage from a number - Step by Step

To subtract a percentage (%) from a number, i.e., If you want to subtract a y percent to an x amount, you can use the following formula:

End Value = x - (( y / 100) * x )

Where: x represents the start or inicial value and y the percent we want to subtract. See the example below:

How to decreasee or subtract 10% to 100?

Plugging the values in the formula above:

End Value = 100 - (( 10 / 100 ) x 100 )

End Value = 100 - (( 0.1 ) x 100 )

End Value = 100 - ( 10 )

End Value = 90 (Answer).

To find more examples, just choose one at the bottom of this page.

See also:

Disclaimer

While every effort is made to ensure the accuracy of the information provided on this website, neither this website nor its authors are responsible for any errors or omissions, or for the results obtained from the use of this information. All information in this site is provided “as is”, with no guarantee of completeness, accuracy, timeliness or of the results obtained from the use of this information.