WACC is calculated as –
WACC = (Weight of common stock X Cost of common stock) + (Weight of debt X After tax cost of debt)
WACC = 10.7 %
Let the weight of debt be x %, so the weight of equity = 1 - x %
10.7 % = ((1-x%) * 14%) + ( x % *(1-.35)*8.5%)
10.7% = (14 % - .14x) + (5.525x%)
x % = 38.94% which is weight of debt
Weight of equity = 1 - 38.94 %
Weight of equity = 61.06%
Debt - equity ratio = debt / equity = 38.94 % / 61.06 %
Debt - equity ratio = 63.77 %