\[3\frac{1^{\backslash 8}}{6}y + 2\frac{7^{\backslash 3}}{16}y - 4\frac{11^{\backslash 4}}{12}y =\]
\[= 1\frac{8 + 21 - 44}{48}y =\]
\[= \left( 1 - \frac{15}{48} \right)y =\]
\[= \frac{33}{48}y = \frac{11}{16}y\]