keeping in mind that there are 60 minutes in 1 hour, thus 4 hours is 4*60 or 240 minutes, thus if we add 45 minutes to that, that'd be 285 minutes, therefore, 4 hours and 45 minutes is 285 minutes.
now, we know the car travels 266 miles in 285 minutes, how many miles does it do in 60 minutes?
[tex]\bf \begin{array}{ccll}
miles&minutes\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
266&285\\
m&60
\end{array}\cfrac{266}{m}=\cfrac{285}{60}\implies \cfrac{266\cdot 60}{285}=m[/tex]
that many.
