Simmy Co$.$ is currently funded with all equity. The firm has expected return of $13\mathrm{.}07\%.$ It's considering borrowing money to buy back some of its shares outstanding. If the current debt cost of capital is $4\mathrm{.}09\%$ and Simmy borrows enough until its debt$-$to$-$equity ratio equals $0\mathrm{.}36,$ what will be the new rE after increasing its leverage?

Input your answer as a percentage and round your final answer to two decimal places. $($i$.$e$.,0\mathrm{.}102345=10\mathrm{.}23\%==>$ type $10\mathrm{.}23).$Simmy Co$.$ is currently funded with all equity. The firm has expected return of $13\mathrm{.}07\%.$ It's considering borrowing money to buy back some of its shares outstanding. If the current debt cost of capital is $4\mathrm{.}09\%$ and Simmy borrows enough until its debt$-$to$-$equity ratio equals $0\mathrm{.}36,$ what will be the new rE after increasing its leverage?

Input your answer as a percentage and round your final answer to two decimal places. $($i$.$e$.,0\mathrm{.}102345=10\mathrm{.}23\%==>$ type $10\mathrm{.}23).$