To do dimensional analysis you have to start off with what is known.
Then it is a series of proprtions, but you have to make sure the units cross out so you are left with
The "yr" cross out and the "d"cross out.
To get the answer all you do is multiply all of the numerators together then divide that number by the numberators, which in this case the numerators are one.
The equation looks like:
1.3yr * 365d/1 yr * 24h/ 1d