excel calculate negative time difference
Problems displaying a calculating negative time in excel 2007. I have a start time of 13:00, end time of 14:00 and a 120 minute break which gives me a negative block time of 1hr (used to forecast attrition). formula in e1: =HOUR(D1) + MINUTE(D1)/60 should return -1.00 which then allows me to calculate for cost.