Time is stored internally by Excel as fractions of a 24-hour day, so
do this:

=A1-B1-1/24

Hope this helps.

Pete

On Jan 29, 12:42*am, GEM wrote:
How do I subtract time?? For example

A1=20:00 HRS
B1=15:00 HRS
C1=(A1-B1)-1

I want to always subtract 1:00 hour from the result. , =(A1-B1)-1 I get,
######
How can I get 4:00 as the answer??