How do you balance this chemical equation: HI(g) → H_2(g) + I_2(g)?

$\frac{1}{2} {I}_{2} \left(g\right) + \frac{1}{2} {H}_{2} \left(g\right) r i g h t \le f t h a r p \infty n s H I \left(g\right)$
How could I remove the $\frac{1}{2}$ coefficient?