Bonjour,
[tex] \frac{ \frac{1}{3} + \frac{1}{5} }{8} = \frac{ \frac{5 \times 1}{3 \times 5} + \frac{1 \times 3}{5 \times 3} }{8} = \frac{ \frac{5}{15} + \frac{3}{15} }{8} = \frac{ \frac{8}{15} }{8} = \frac{8}{15} \times \frac{1}{8} = \frac{1}{15} [/tex]
