Total hours in decimal format

Arrival time Exit time Hours
24/03/2020 21:15
25/03/2020 04:14
6.97
23/03/2020 07:00
23/03/2020 09:00
2
23/02/2020 07:00
25/03/2020 04:14
741.23


Code:
let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    HoursDec = Table.AddColumn(Source, "Hours", each Number.Round(Duration.TotalHours([Exit time]-[Arrival time]),2)),
    TSC = Table.SelectColumns(HoursDec,{"Hours"})
in
    TSC