Question

Solve for m: 2/5=m/70

Answer 1

$multiply \space\ both \space\ sides \space\ by \space\ 70$
$\frac{70(2)}{5}=\frac{70m}{70}$
$\frac{140}{5}=1m$
$28=m$
$m=28$

Answer 2

2/5 = m / 70
cross multiply because this is a proportion
(5)(m) = (2)(70)
5m = 140
m = 140/5
m = 28 <===