A firm currently has a debt$-$equity ratio of $2/3.$ The debt, which is virtually riskless, pays an interest rate of $7\%.$ The expected rate of return on the equity is $10\%.$ What is the Weighted$-$Average Cost of Capital if the firm pays no taxes? Enter your answer as a percentage rounded to two decimal places. Do not include the percentage sign in your answer.

WACC $=$

Number