A company has a debt$-$to$-$equity ratio of $0\mathrm{.}7.$ The discount rates for the company$$s stock and bond are $20\%$ and $10\%,$ respectively. Assuming a $21\%$ income tax rate, what is the company$$s weighted average cost of capital $($WACC$)?$

Hint: You can assume the value of equity E $=1.$

Note: Write your answer in $\%$ terms with $2$ or more decimal places. For example, write $2\mathrm{.}54(\%)$ instead of $0\mathrm{.}0254.$