Ответ:
Преобразуем смешанные числа: \(2\frac{4}{15}=\frac{34}{15}\), \(1\frac{1}{15}=\frac{16}{15}\).
\[2-1\frac{1}{15}=\frac{30}{15}-\frac{16}{15}=\frac{14}{15}.\]
\[\frac{14}{15}:\frac{4}{9}=\frac{14}{15}\cdot\frac{9}{4}=\frac{21}{10}.\]
Тогда \[\frac{34}{15}-\frac{21}{10}+\frac{2}{3}=\frac{68}{30}-\frac{63}{30}+\frac{20}{30}=\frac{25}{30}=\frac{5}{6}.\]
Ответ: \(\frac{5}{6}\).
