Given the two triangles, and the sine ratio formula is equal to:
Sin(x) = O/H
Where x is one angle of the triangle
O is the opposite side of the angle x
H is the hypotenuse of the triangle
To solve this we have to fine O/H = 4/5
So the answer is
Sin (P) = 16/20 = 4/5
So angle P has the sine ratio of 4/5