Answer:
18.29%
Step-by-step explanation:
Return on Equity is the net profit available for equity/ Total equity value.
Total equity = Total assets - Total debt
= $90 million - $55 million = $35 million
Earnings for equity = Annual sales 
 net profit margin 4%
 net profit margin 4%
= $160 million 
 4% = 6.4 million
 4% = 6.4 million
Therefore, return on equity = 

= 

Therefore, ROE = 18.29%