15.9 units is the answer plus just for the future you should try plotting them down and adding that to the question.
Well,
We can read 9.33 as 9 and 33 hundredths.
In fraction form that would be:

That is already simplest form.
If you meant

, then it would be:
21 tens is 210 and 52 ones is 52
210+52= 262
460miles
Explanation:
115/hr
4 hrs
115•4=460
Hope this helps!