#### Answer

$n=28$

#### Work Step by Step

We are trying to solve for the given variable so that the proportion is true.
To determine if a proportion is true, we have to find if the cross products are equal.
The cross products of $\frac{a}{b}=\frac{c}{d}$ are $a \cdot d$ and $b \cdot c$.
$-0.2*n=-8*0.7$
$-0.2n=-5.6$
$-0.2n\div-0.2=-5.6\div-0.2$
$n=28$