If pq=23\frac{p}{q} = \frac{2}{3}qp=32 and qr=45\frac{q}{r} = \frac{4}{5}rq=54, what is pr\frac{p}{r}rp?
615\frac{6}{15}156
815\frac{8}{15}158
25\frac{2}{5}52
45\frac{4}{5}54