Answer:
ROE increase = 5.33%
Step-by-step explanation:
DuPont Equation (ROE): (Net Income / Sales) x (Sales / Total Assets) x (Total Assets / Average Shareholders Equity)
ROE = ($20 / $200) x ($200 / $500) x ($500 / $250) = 8%
New ROE = ($20 / $200) x ($200 / $300) x ($300 / $150) = 13.33%
Gambona´s ROE would increase by 5.33%