Macro - wrong column reference

Hi,

I've recorded a macro to do a simply subtraction of two cells (Column E - Column F). I used the option for "relative references" when recording the macro, and this works correctly for the following rows.
The problem I have is that I need to execute this macro in a number of possible columns, however the macro seem to record the "distance" from the columns where it should perform the subtraction. As a result it won't work when it try and execute in a different column to the one where it originally recorded the macro.

How can I change the macro so that performs the subtraction for columns E and F, regardless of which column I execute the macro in?

Current macro code is as follows:

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Thank you for your help.
Steve.

Thanks a lot!