Your answer for ? is 22.5 or 22 1/2
To solve this you would cross multiply
45 x 1 = 45
2x = 2x
Then, you would divide those by 2
2x/2 = x
45/2 = 22.5
Finally, I would convert the 22.5 minutes into hours by dividing 22.5 and 60
22.5/60
= .375 h
And there's my answer! :)