working out productivity using HOURS and units to establish accurate daily result

Hi,

I have a slight issue with a formula. Seems to work most of the time but have an issue with smaller numbers.

The formula I am using to calculate productivity is:

=B26/HOUR(G26/(7*F26))

One person is coming up with a #DIV/0 error and this appears to be because when evaluating the formula we have a 0.267777 and then B26 tries to divide by zero hence the error.

The numbers I have are as follows:

B26 = 7
G26 = 5:46 (in [h]:mm format)
F26 = 1

basically the formula is = (new cases/(hours worked*FTE)

any help around the error or a better formula?