Answer
$-9$.
Work Step by Step
The given expression is
$=\left (\frac{-3}{-4} \right )(-12)$
Use the rules for dividing signed numbers.
$=\left (\frac{3}{4} \right )(-12)$
The product is negative
$=-\left (\frac{3}{4}\times 12 \right )$
Simplify.
$=-9$.