Greeneco is a company specializing in energy savings. Greeneco has 7,2 million shares outstanding and a current share price of $2,7 per share. It also has $66,9 million in outstanding debt, with a debt cost of capital of 8,7%. Greenecos equity cost of capital is 17,4% and the corporate tax rate is 27,2%. What is Greeneco's weighted average cost of capital? Round your answer to two decimal places in percentage form.