1) \(7 - 2\frac{2}{5} = 7 - \frac{12}{5} = \frac{35}{5} - \frac{12}{5} = \frac{23}{5}\)
2) \(5\frac{8}{15} = \frac{83}{15}\)
3) \(\frac{23}{5} : \frac{83}{15} = \frac{23}{5} \cdot \frac{15}{83} = \frac{23 \cdot 15}{5 \cdot 83} = \frac{23 \cdot 3}{1 \cdot 83} = \frac{69}{83}\)
Ответ: \(\frac{69}{83}\)