A company's balance sheets show a total of $ 28 million long-term debt with a coupon rate of 10 percent. The yield to maturity on this debt is 9.72 percent, and the debt has a total current market value of $ 31 million. The balance sheets also show that that the company has 10 million shares of stock; the total of common stock and retained earnings is $30 million. The current stock price is $7.5 per share. The current return required by stockholders, r{s} is 12 percent. The company has a target capital structure of 40 percent debt and 60 percent equity. The tax rate is 30%. What weighted average cost of capital should you use to evaluate potential projects? Express your answer in percentage (without the % sign) and round it to two decimal places.