1) The first thing to do is to consider that there is a relation between 1 fluid ounce and its equivalence to quarts.
[tex]1\:fl\:oz=0.03125\:qt[/tex]2) Based on that, we can set a proportion between fluid ounces and quarts to find either approximately or exactly how many quarts correspond to that.
[tex]\begin{gathered} fl\:oz\:-----quarts \\ 1\:\:\:\:\:\:\:\:\:\:0.03125 \\ 480\:\:\:\:\:\:\:\;x \\ \\ x=480\times0.03125 \\ \\ x=15\:qt \\ \end{gathered}[/tex]That is the answer.
