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Formula for subtracting a percentage

  1. #1
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    Formula for subtracting a percentage

    Please might I have help with a formula for the following:
    Col A contains 25
    Col B contains 28
    Col C contains 15

    I need to add 25 to 28 and from the total minus 15 as a percent, i.e. AplusBminus15%
    I'm sure it's elementary but I'm grateful if anyone can help
    Many thanks

  2. #2
    Forum Moderator daddylonglegs's Avatar
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    Try

    =(A1+B1)*(1-C1/100)

  3. #3
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    Fabulous!
    Thank you - what does that "1-" do. I recall it now from years ago and never then understood why it works! That can be considered a rhetoric question if the explanation is tedious.
    Many thanks again

  4. #4
    Forum Moderator daddylonglegs's Avatar
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    If you are subtracting 15% from the total this is the same as multiplying the total by 85%.....1-C1/100 gives you 85% where C1= 15

  5. #5
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    Ah ha! Yes. Thanks, thanks!

  6. #6
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    Re: Formula for subtracting a percentage

    I need to make one column a percentage of a column next to it without typing the formula in every cell. Example. I need each cell in column d to be 90% displayed in column c.

  7. #7
    Forum Expert oldchippy's Avatar
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    Re: Formula for subtracting a percentage

    Hi indatser,

    Welcome to the forum, but...............

    Your post does not comply with Rule 2 of our Forum RULES. Don't post a question in the thread of another member -- start your own thread. If you feel it's particularly relevant, provide a link to the other thread.
    Last edited by oldchippy; 08-14-2010 at 06:17 PM.
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