1) $$8 : \frac{4}{5} = 8 \cdot \frac{5}{4} = 2 \cdot 5 = 10$$
3) $$\frac{8}{15} : 24 = \frac{8}{15} \cdot \frac{1}{24} = \frac{1}{15} \cdot \frac{1}{3} = \frac{1}{45}$$
5) $$1 \frac{3}{5} : 5 \frac{1}{3} = \frac{1 \cdot 5 + 3}{5} : \frac{5 \cdot 3 + 1}{3} = \frac{8}{5} : \frac{16}{3} = \frac{8}{5} \cdot \frac{3}{16} = \frac{1}{5} \cdot \frac{3}{2} = \frac{3}{10}$$