4 6 5 5

\[ \frac{4}{5} \div \frac{6}{5} = \frac{4}{5} \cdot \frac{5}{6} = \frac{4 \cdot 5}{5 \cdot 6} = \frac{20}{30} = \frac{2}{3} \]

Ответ: \(\frac{2}{3}\)