Question

(2/5+1/5)÷_1/4+2/4)
com conta

Answer 1

$\frac{\frac{2}{5}+\frac{1}{5} }{\frac{1}{4} +\frac{2}{4} }  = \frac{\frac{2+1}{5} }{\frac{1+2}{4} } = \frac{\frac{3}{5} }{\frac{3}{4} } = \frac{3}{5} *\frac{4}{3} =\frac{4}{5}$

Abraços.