# Formula for subtracting a percentage

1. ## 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. Try

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

3. 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. 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. Ah ha! Yes. Thanks, thanks!

6. ## 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. ## 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.

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