Last Year, a corporation had a book value of equity of $$379\mathrm{.}77$ million of USDs, $12\mathrm{.}79$ million shares outstanding,and a market price of $$42\mathrm{.}10$ per share. The corporation also had cash of $$2\mathrm{.}81$ million of USDs, and total debt of$$403\mathrm{.}79$ million USDs. What was the corporation's book debt$-$equity ratio?