Reverse the calculation: End time minus start time.
=(a1-A2)*24
Format as general or number, not time

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Kind regards,

Niek Otten

"GregJ" wrote in message
...
I would like to write a formula where I would input the starting time of a
project or customer call minus the finishing time and then convert that
amount of minutes to tenths of an hour.
Any ideas how?
Thanks
Greg Johnson