If $P(A) = \frac{2}{3}$,$P(B) = \frac{4}{9}$ and $P(A \cap B) = \frac{14}{45}$,then find $P(A \cup B)$.

  • A
    $\frac{4}{5}$
  • B
    $\frac{1}{5}$
  • C
    $\frac{2}{5}$
  • D
    $\frac{7}{9}$

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