Question

hola necesito ayuda porfavor

Answer 1

$\frac{2}{5} + \frac{3}{7} = \frac{2 \times 7 + 5 \times 3}{5 \times 7} = \frac{14 + 15}{35} = \frac{29}{35}$
$\frac{1}{5} - \frac{1}{8} = \frac{1 \times 8 - 1 \times 5}{5 \times 8} = \frac{3}{40}$
Ojalá te sirva xd ...