ANSWER
8/15
EXPLANATION
The tangent of an angle in a right triangle is the ratio:
[tex]tan\theta=\frac{\text{opposite side}}{\text{ adjacent side}}[/tex]
In this case, the opposite side to the angle N is OP and its adjacent side is PN:
[tex]\tan N=\frac{OP}{PN}=\frac{8}{15}[/tex]
