I see that Duane's suggestion got you past your immediate
problem. Â Personally, I would use a specific format such as
    #,##0.0
but that's just because I can not remember what the named
formats really do.
As Duane also mentioned, it looks like you might have bigger
problems with the table having inter-related fields, which
would be a violation of The Rules of Relational Database
Normalization (google it).
--
Marsh
MVP [MS Access]
The control source is "Principle1" (one of 5, actually, Principle1,
Principle2, etc.). Â It is a column in a table of type Number, Single,
nothing in "Format." Â It is loaded by the following bit of code.
     !Principle2 = isng_Principle2 / (ii_Principle2Count)
The other variables are "single" and "integer".