\[\boxed{\text{5.315.}}\]
\[\frac{1}{12} = \frac{1 \cdot 2}{12 \cdot 2} = \frac{2}{24}\ \]
\[\frac{1}{8} = \frac{1 \cdot 3}{8 \cdot 3} = \frac{3}{24}\ \]
\[\frac{4}{6} = \frac{4 \cdot 4}{6 \cdot 4} = \frac{16}{24}\ \]
\[\frac{7}{8} = \frac{7 \cdot 3}{8 \cdot 3} = \frac{21}{24}\ \]
\[\frac{2}{3} = \frac{2 \cdot 8}{3 \cdot 8} = \frac{16}{24}\ \]