Problem $3-27$ Internal Growth Rate $($LG$3-6)$

Dogs R Us reported a profit margin of $9\mathrm{.}70$ percent, total asset turnover of $0\mathrm{.}67$ times, debt$-$to$-$equity of $0\mathrm{.}80$ times, net income of $$420,000,$ and dividends paid to common stockholders of $$168,000.$ The firm has no preferred stock outstanding.

What is Dogs R Us's internal growth rate? $($Do not round intermediate calculations and round your final answer to $2$ decimal places.$)$

Internal growth rate