(Defining capital structure weights) In August 2015 the capital structure of the Emerson Electric Corporation (EMR) (measured in book and market values) was as follows: Book Value ($ Millions) Short-term debt Long-term debt Common equity Total capital $2,634 4,305 7,999 $14,938 Market Value $2,634 4,305 35,670 $42,609 What weights should Emerson use when computing the firm's weighted average cost of capital? The appropriate weight of debt, wd, is %. (Round to one decimal place.)