A solution of methanol $(C{H}_{3}OH)$ in water, if the molality of solution is $0\mathrm{.}45$mol$\frac{e}{k}g$ water, find the mass $\%$ of methanol in solution.

Molar mass of methanol $=32\frac{g}{?}$ mole

$2\mathrm{.}8\%$

$1\mathrm{.}42\%$

$2\mathrm{.}8\%$

$6\mathrm{.}3\%$