\[8\frac{3}{8} - 5\frac{5}{6} = 7\frac{11^{\backslash 3}}{8} - 5\frac{5^{\backslash 4}}{6} =\]
\[= 7\frac{33}{24} - 5\frac{20}{24} = 2\frac{13}{24}\]