AMC 8 2012 Problem 4

Peter's family ordered a 12-slice pizza for dinner. Peter ate one slice and shared another slice equally with his brother Paul. What fraction of the pizza did Peter eat? $\textbf{(A)}~\frac{1}{24} \textbf{(B)}~\frac{1}{12} \textbf{(C)}~\frac{1}{8} \textbf{(D)}~\frac{1}{6} \textbf{(E)}~\frac{1}{4}$