How do I convert a value from ANSI to ISO format within a table cell

Hi there,

    I am calling out a dimension within a table cell as follows:

    &rpt.rel.max        [ &rpt.rel.maxmetric ]

     In this case max = d100   and maxmetric = d100*25.4= 25.4

     The problem is I want maxmetric to show 25.4 = 25,4 to be consistent with the ISO format.

      Is there a  tag that I can add to show the "." as a ","?

I hope that wasn't too confusing and thanks in advance.