Reduce $\frac{128352}{238368}$ to its lowest terms.

The correct option is D: $\frac{7}{13}$

So, H.C.F. of $128352$ and $238368=18336.$

$\therefore \frac{128352}{238368}=\frac{128352÷18336}{238368÷18336}=\frac{7}{13}$