Water decomposes at 2300 K

$\mathrm{H_2O(g)\to H_2(g)+\frac{1}{2}O_2(g)}$

The percent of water decomposing at 2300 K and 1 bar is ___________ (Nearest integer).

Equilibrium constant for the reaction is $2\times10^{-3}$ at 2300 K.