As you can calculate, the firm has a current debt ratio $($total liabilities to total assets$)$ of

$21\mathrm{.}818\%.$ If the firm had been able to increase its debt ratio in $2002$ to $30$ percent, while

maintaining the same level of ROA $($for example, it could increase non$-$interest paying current

liabilities, use the proceeds to reduce equity outstanding, and there would then be no impact

on interest or on ROA$),$ by how much would the ROE have changed?