AMC 8 1989 Problem 12

$\frac{1-\frac{1}{3}}{1-\frac{1}{2}} =$ $\text{(A)}\ \frac{1}{3} \text{(B)}\ \frac{2}{3} \text{(C)}\ \frac{3}{4} \text{(D)}\ \frac{3}{2} \text{(E)}\ \frac{4}{3}$