One way:

=IF(F2=0,"",SUM(F3:F4)/F2)

In article ,
ferde wrote:

C D E F
Jan-Mar April-Jun Jul-Sep Oct-Dec
3 3 3 0
0 1 0 0
0 1 2 0
0% 67% 67% #DIV/0!


I am trying to use the following formula to get rid of the DIV/O error in F5
=if(count(f2:f4)=0,"", otherwise sum(f3:f4)/f2.

Thank you in advance for any help you can offer