Assume the adjoining chart shows the $1980$ U.S. population, in millions, for each region by ethnic group.  To the nearest [percent](https://artofproblemsolving.com/wiki/index.php/Percent), what percent of the U.S. Black population lived in the South?
\[\begin{tabular}[t]{c|cccc}  & NE & MW & South & West \\ \hline White & 42 & 52 & 57 & 35 \\ Black & 5 & 5 & 15 & 2 \\ Asian & 1 & 1 & 1 & 3 \\ Other & 1 & 1 & 2 & 4  \end{tabular}\]
$\text{(A)}\ 20\% \qquad \text{(B)}\ 25\% \qquad \text{(C)}\ 40\% \qquad \text{(D)}\ 56\% \qquad \text{(E)}\ 80\%$
There are $5+5+15+2=27$ million Blacks living in the U.S.  Out of these, $15$ of them live in the South, so the percentage is $\frac{15}{27}\approx \frac{60}{108}\approx 56\%$.
$\boxed{\text{D}}$