Rotational Motion

\(\mathrm{I_{CM}}\) is the moment of inertia of a circular disc about an axis (CM) passing through its center and perpendicular to the plane of disc. \(\mathrm{I_{AB}}\) is it's moment of inertia about an axis AB perpendicular to plane and parallel to axis CM at a distance \(\frac{2}{3}\)R from center. Where R is the radius of the disc. The ratio of \(\mathrm{I_{AB}}\) and \(\mathrm{I_{CM}}\) is \(x:9\). The value of \(x\) is _____________.