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John Gentile, MS M(ASCP)
Phone: (401) 273-7100 ext 2046
Fax: (401) 457-3069
e-mail:
Laboratory Information Manager
VAMC Providence

Assuming your formula is =A1/A2 then use

=IF(A2=0,0,A1/A2)

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Regards
Ken....................... Microsoft MVP - Excel
Sys Spec - Win XP Pro / XL 97/00/02/03

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It's easier to beg forgiveness than ask permission :-)
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"John Gentile" wrote in message
...

--
John Gentile, MS M(ASCP)
Phone: (401) 273-7100 ext 2046
Fax: (401) 457-3069
e-mail:
Laboratory Information Manager
VAMC Providence

Couple of ways.

1 - use conditional formatting with this formula
=ISERROR(C1)
format font color same as background color

2 - alter your formula so that it will return blank or zero if a certain
cell is empty
=IF(B1="","",A1/B1)

HTH
Jean-Guy
"John Gentile" wrote:


--
John Gentile, MS M(ASCP)
Phone: (401) 273-7100 ext 2046
Fax: (401) 457-3069
e-mail:
Laboratory Information Manager
VAMC Providence