8. \(\left(5\frac{3}{5}-1\frac{1}{3}\right):\left(7\frac{7}{12}-2\frac{1}{4}\right)\cdot1,65\)

Сначала вычислим значения в скобках.

1. \(5\frac{3}{5}-1\frac{1}{3}=\frac{28}{5}-\frac{4}{3}=\frac{84-20}{15}=\frac{64}{15}\).
2. \(7\frac{7}{12}-2\frac{1}{4}=\frac{91}{12}-\frac{9}{4}=\frac{91}{12}-\frac{27}{12}=\frac{16}{3}\).
3. \(\frac{64}{15}:\frac{16}{3}=\frac{64}{15}\cdot\frac{3}{16}=\frac{4}{5}\).
4. \(\frac{4}{5}\cdot1,65=0,8\cdot1,65=1,32\).

Ответ: 1,32.