Question

10/(1-2/5)=10/3/5. Mas por que 1-2/5 =3/5 ?

Answer 1

Boa noite Jade

10/(1 - 2/5) 

1 - 2/5 

veja bem

5/5 - 2/5 = (5 - 2)/5 = 3/5 

10/(3/5) = 50/3 

Answer 2

$\frac{10}{1- \frac{2}{5} }=\\\\\frac{10}{\frac{5-2}{5} }=\\\\ \frac{10}{ \frac{3}{5} }=\\\\10* \frac{5}{3}=\\\\\frac{50}{3}$