What should be added to $\large\frac{19}{27}$ to make it $\large\frac{-13}{15}$

Question

$\begin{array}{1 1} \large\frac{212}{135} \\\large\frac{17}{19} \\ \large\frac{-13}{15} \\ \large\frac{-212}{135} \end{array}$