According to the balance sheet of Ralk Inc., they have a total of $$60$ million in long$-$term debt, whose market value is $$40$ million. The balance sheet also reports that the company has $$50$ million worth of common equity and $$10$ million in preferred equity. Given their current prices, the market value of common equity is $$100$ million and the market value of preferred equity is $$20$ mil. What is the market value weight of its preferred equity?