Problem $4-18$ Growth and Profit Margin $[$LO$3]$ El Rey Company wishes to maintain a growth rate of $11\mathrm{.}6$ percent per year, a debt$-$equity ratio of $1\mathrm{.}6,$ and a dividend payout ratio of $25$ percent. The ratio of total assets to sales is constant at $\mathrm{.}88.$ What profit margin must the firm achieve? Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$ Profit margin $6$