time notation hours minutes
When entering time, the decimal point is used to represent a percentage of an hour. For example, 2.25 = 2 hours 15 minutes. 2.5 = 2 hours 30 minutes. 1.7 = 1 hour 42 minutes. If you want to designate minutes when you enter time, use a colon. 2:15 = 2 hours 15 minutes.