Changing to 1904 calendar affects many things and isn't always desirable.

How about doing something like

=IF(A1B1,A1-B1,B1-A1)

and then in an adjacent cell add

=IF(B1A1,"Decrease","")

or even use conditional formatting to show decreases.

--
HTH

Bob Phillips

(remove nothere from email address if mailing direct)

"Ardus Petus" wrote in message
...
ToolsOptionsCalculation: 1904 calendar

HTH
--
AP

"rob" a écrit dans le message de
...
I keep track of times in "mm:ss.00" format, and i've set up a formula
that
deducts week B's time from week A's time - in order to show improvement.
If
the time decreases week to week excel outputs a positive to represent
this. I
would like it to ouput a negative number to represent increases in time.

Problem is, excel won't allow times to be negative - if they are it
fills
the cell with "#" symbols.

Does anyone have any solutions to this.

Thanks