how to subtract 2 dates to get the result in hour and minute

Hi there.. I have 2 date fields in my table. I want to subtract these 2 date fields to get the result in hour and minute. Below is what I have and what I am doing but the result is not as I want.. Date1 Date2 date2-date1*24 (is what I am doing) 21-06-2011 14:00:00 21-06-2011 16:55:00 2.9166667 21-06-2011 07:00:00 21-06-2011 16:50:00 9.8333333 21-06-2011 07:20:00 21-06-2011 16:30:00 9.1666667 I want to deduct date2 from date1 and represent hours and minutes in one decimal figure. Date1 Date2 date2-date1*24 (this is how I want) 21-06-2011 14:00:00 21-06-2011 16:55:00 2.55 21-06-2011 07:00:00 21-06-2011 16:50:00 9.5 21-06-2011 07:20:00 21-06-2011 16:30:00 9.5 I guess its simple arithmetic but im not getting it right..Any help will be very much appreciate. Thanks in Advance x 1000 times. Regards, Mack