JEE 2023 — Mathematics PYQ

Let the ellipse $E:x^2+9y^2=9$ intersect the positive $x$-and $y$-axis at the points $A$ and $B$ respectively. Let the major axis of $E$ be a diameter of the circle $C$. Let the line passing through $A$ and $B$ meet the circle $C$ at the point $P$. If the area of the triangle with vertices $A,P$ and the origin $O$ is $\frac{m}{n}$, where $m$ and $n$ are coprime, then $m-n$ is equal to: