How Do I Change Hours & Minutes Into a Decimal Number in Excel?. ... Using a quick equation, you can convert an existing set of time data written in "hh:mm" format to hours in decimal format.

Everybody knows that there are 24 hours in a day, 60 minutes in an hour, and 60 seconds in minute.* But in 1793, the French smashed the old clock in favor of French Revolutionary Time: a 10-hour ...