Can you please help with determining the New Return on Equity? Thank you.

The common stock and debt of Northern Sludge are valued at $66 million and $34 million, respectively. Investors currently red return of 16.4% on the common stock and a return of 7.696 on the debt. If Northern Sludge issues an additional $15 million of co stock and uses this money to retire debt, what happens to the expected return on the stock? Assume that the change in capital structure does not affect the interest rate on Northern's debt and that there are no taxes. (Do not round intermediate calculati Enter your answer as a whole percent.) New return on equity