The Color Box uses a combination of common stock, preferred stock, and debt financing. The company wants prferred stock to represent 10% of the total financing. It also wants to structure the firm in a manner that will produce a weighted average cost of capital of 9.9%. The after-tax cost of debt is 5.6%, the cost of preferred is 8%, and the cost of common stock is 18.2%. What percentage of the firm's capital funding should be debt financing? (Do not round intermediate calculations. Round your final answer to two decimal places and express in percentage form. e.g., %)