I am trying to get the difference between a start and end time.  I'm close but I need a little help. 

I am using this formula
(DateDiff ("n", Minimum ({store_audit.audit_date}, {store_audit.audit_date}, "daily"), Maximum ({store_audit.submit_date}, {store_audit.audit_date}, "daily")))/60

This works ok but I get results such as 9.97 which i understand means it is close to 10 hours.  But how do I get to be in minutes - so something like 9 hours and 56 minutes (guessing)

The data that it grabs looks like this.
Begin time 8/22/2012 11:44:54am
end time 8/22/2012 11:24:13pm

Worked Perfect!!! Thank you!!