Is there some other way to allow the user to set the precision as the format string does not allow parameters...?
"%[0 or more flags][field_width][.precision] conv_spec"
Does STR (numeric_expression, length, fractions) not give you what you want?
Ah. I was dealing with the Length input wrong so it was bugging out. And Fractions cannot be bigger than Length? Length being Fractions + 1 seems to work well.