Hi and welcome to the forum
1 thing to remember about working with time in excel, is that excel treats time as a fraction/decimal of 1. So 6am is actually 0.25, 12 noon is 0.5 etc. So if you are working with time that goes from 1 day to the next, you need to subtract the start time from 1.00 and then the end time (in simple terms)
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