Chemistry Question from JEE Main 2023 · 10 April, Shift 2

For the given reaction, if the initial pressure is $450 \, \text{mmHg}$ and the pressure at time $t$ is $720 \, \text{mmHg}$ at a constant temperature $T$ and constant volume $V$. The fraction of $A(\text{g})$ decomposed under these conditions is $x \times 10^{-1}$. The value of $x$ is _____ (nearest integer)