I'm struggling a bit with this one. Can someone please show me the work required to find the result. I know the answer is $\displaystyle \frac{7}{16}$ but I'm not sure how to arrive at that.

The question is:

$\displaystyle \lim \frac{-7x^2-4x+16}{-16x^2+3x+3} as x \rightarrow -\infty$