U KNO, Inc. uses only debt and common equity funds to finance its assets. This past year the firm's return on total assets was $25\%.$ The firm financed $45\%$ of its assets using debt. What was the firm's return on common equity?

$45\mathrm{.}45\%$

$55\mathrm{.}56\%$

$51\mathrm{.}07\%$

$60\mathrm{.}96\%$

$40\mathrm{.}79\%$