theres 30 minutes in a half hour.. theres 90 minutes in an hour and a half.
There are 60 minutes in one hour. 0.5 hours is the same as half an hour, so half of sixty minutes is 30 minutes.
Two and a half hours is equal to 150 minutes. To convert hours to minutes, you multiply the number of hours by 60 since there are 60 minutes in an hour. Therefore, 2.5 hours x 60 minutes/hour = 150 minutes.
You have to know that there are 60 minutes in an hour. "2 and one half hours" = 2.5 hours (2.5 hours)*(60 minutes/hour) = 150 (hours*minutes/hour) = 150 minutes Note that you multiply & divide the units as if they were numbers. This is dimensional analysis.
An hour is equal to 60 minutes, so 150 minutes is equal to 2 and a half hours or 2 hours and 30 minutes.Two hours and thirty minutes, or two and a half hours, or 2.5 hours.