if for some reason you chose to convert it to text you can format it during the conversion but as Kevlray indicates there are easy formatting options while keeping it numeric.
totext(number_field, x ,"")
the X is the number of decimal places you want
the "" indicates not to use the anything (e.g. a comma) as a seperator
or you can apply formatting with lead zero like this
totext(number_field,"00000.00")
quite a few options in the format process that are well explained in Crystal Help
Edited by DBlank - 11 Feb 2015 at 7:55am