Let's begin by identifying key information given to us:
[tex]\begin{gathered} \frac{18}{4} \\ \text{Divide through by 2, we have:} \\ =\frac{18}{4}\cdot\frac{1}{2}=\frac{9}{4} \\ =\frac{9}{4}\Rightarrow2\frac{1}{4} \\ =2\frac{1}{4} \end{gathered}[/tex]