Excel Conditional formating for HH:MM:SS

Hi guys

I am subtracting two time fields which are in HH:MM:SS format and want to higlight if anything which is smaller -00:15:00 in the column L.
I have selected teh date system as of 1904 so that I can see the -ive value.
Basically subtracting two time values and highlight any value which is smaller than -00:15:00.
Please find attached the sample sheet.

thanks a lot for help
Test_ConditionalFormating.xlsx
surah79Asked:
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Wayne Taylor (webtubbs)Commented:
In Column L, use this formula in your Conditional Formula...

    =L1<-(1/24/60*15)
1

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