What should be added to $5 \large\frac{4}{15}$ to get $12 \large\frac {3}{5}$?

Question

( A ) $\large\frac{22}{3}$
( B ) $\large\frac{2}{3}$
( C ) $\large\frac{1}{2}$
( D ) $\large\frac{21}{4}$