If a firm finances with only debt and common equity, and if its financial leverage multiplier is $3\mathrm{.}0,$ then its debt ratio $($Liabilities $/$ Assets$)$ must be$.$

Group of answer choices

$0\mathrm{.}333$

$1\mathrm{.}333$

$1\mathrm{.}0$

$0\mathrm{.}6667$

$3\mathrm{.}0$