I would like to calculate the difference between two dates and times and have
the result be in hh.mm.

So if in Cell A1 I have '8/15/2005 9:30 AM'
and if in Cell A2 I have '8/16/2005 11:17 AM' then...

I would want the result in Cell A3 to be 26:01.

Can anyone tell me what formula I would use to do this? My boss asked me
just a few minutes ago!