If the activation energy of a reaction is 80.9 kJ mol^-1, the fraction of molecules at 700 K, having enough energy to react to form products is e^-x.…

If the activation energy of a reaction is $\displaystyle 80.9 \mathrm{~kJ} \mathrm{~mol}^{-1}$, the fraction of molecules at $\displaystyle 700$ K , having enough energy to react to form products is $\displaystyle \mathrm{e}^{-x}$. The value of $\displaystyle x$ is \_\_\_\_. (Rounded off to the nearest integer) [Use $\displaystyle \mathrm{R}=8.31 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$ ]