What must be added to $ \large\frac{-3}{8} $ to get $\large\frac{5}{16}$?

Question

$\begin{array}{1 1} \large\frac{11}{16} \\ \large\frac{-11}{16} \\ \large\frac{16}{11} \\ \large\frac{-16}{11} \end{array} $