I am trying to compare stop watch times against a control time which is a touch pad time.

I populated the touch pad times along with the stop watch times and formatted the times using the custom format mm:ss.00

I then created a simple formula that subtracts the stop watch time from the touch pad time to determine the delta.

The problem: If the delta is either zero (same times) or positive, it works. If the delta is negative, it does not work, just shows up as #####.

Example:
1:05.00 1:04.00 =(A-B) 00:01.00 works
1:05.00 1:05.00 =(A-B) 00:00.00 works
1:05:00 1:06.00 =(A-B) ###### Does not work regardless of the column width

Any thoughts?

Hi,

Am Thu, 10 Nov 2016 12:50:16 +0000 schrieb Curtopia:

Example:
1:05.00 1:04.00 =(A-B) 00:01.00
works
1:05.00 1:05.00 =(A-B) 00:00.00
works
1:05:00 1:06.00 =(A-B) ###### Does not
work regardless of the column width

if you only want to display the delte try:
=IF(A1=B1;A1-B1;"- "&TEXT(B1-A1;"mm:ss,00"))

If you want to calculate with the delta:
Excel options = Advanced = When calculating this workbook and activate
"Use 1904 date system"


Regards
Claus B.
--
Windows10
Office 2016

Thank you Claus...

I could not get the formula to work but I have determined that even though a negative delta displays as #######, the cell is holding the correct delta so when I add all the deltas and average them, it is accurate. It would be helpful to display the negative like it does the = or + so if you have any other thoughts, let me know. Thanks again for taking the time to help.

Hi,

Am Thu, 10 Nov 2016 17:59:31 +0000 schrieb Curtopia:

=IF(A1=B1;A1-B1;"- "&TEXT(B1-A1;"mm:ss,00"))

I could not get the formula to work but I have determined that even
though a negative delta displays as #######, the cell is holding the
correct delta so when I add all the deltas and average them, it is
accurate. It would be helpful to display the negative like it does the
= or + so if you have any other thoughts, let me know. Thanks again for
taking the time to help.

sorry, the format I wrote is a german format. Try:
=IF(A1=B1;A1-B1;"- "&TEXT(B1-A1;"mm:ss.00"))

Or have a look:
https://1drv.ms/x/s!AqMiGBK2qniT_UyWDLtfoMvGp3Ir


Regards
Claus B.
--
Windows10
Office 2016