ABC's cost of debt is $9\mathrm{.}4\%$ and cost of equity is $22\mathrm{.}1\%.$ The D $/$ E ratio is $4\mathrm{.}47.$ Assume no taxes. What is the firm's weighted average cost of capital $($WACC$)?$ Enter your answer as a percentage rounded off to two decimal points. Do not enter $\%$ in the answer box.