b$.$ What is the ratio of real assets to total assets for nonfinancial firms in the following table? $($Round your answer to $4$ decimal places.$)$

$\backslash$table$[[$Assets$,$$ Billion,$\%$ Total,Liabilities and Net Worth,$ Billion,$\%$ Total$],[$Real assets,,,Liabilities,,$],[$Equipment and software,$$4,402,16\mathrm{.}4\%,$Bonds and mortgages,$$5,364,20\mathrm{.}0\%$