9) \(\frac{4}{5}-\frac{2}{3}+\frac{4}{15}\)

Общий знаменатель: 15.

\(\frac{4}{5}-\frac{2}{3}+\frac{4}{15}=\frac{12}{15}-\frac{10}{15}+\frac{4}{15}=\frac{6}{15}=\frac{2}{5}\).

Ответ: \(\frac{2}{5}\)