I have a worksheet that has vertical columns labeled with the months and
under these columns is revenue we have earned from these customers.
Vertically I have the customers listed. What I am trying to do is
extract the customers that sales have decreased by say 30% from Jan to
Feb.

Is this possible?

I have attached an example of my current layout.


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swfisher
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If you have a column that measures the change in sales from January to
February, then you can apply a filter to that column using Custom | Is
Less than and specifying -30% (or greater than 30%, depending on how
your formula is set up). You can highlight the visible rows, click
<copy then paste them to another part of the worksheet or to a new
sheet.

Hope this helps.

Pete