$$\left. \begin{array} { l } { 2 \frac { 3 } { 4 } } \end{array} \right.$$
$\frac{11}{4}=2.75$
$$\frac{8+3}{4}$$
$$\frac{11}{4}$$
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$\frac{11}{2 ^ {2}} = 2\frac{3}{4} = 2.75$