It is equal. .21 ia the same as 21%
        
                    
             
        
        
        
Answer:
17.043956
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
The answer is B 
Step-by-step explanation:
Each smaller rectangle is being multiplied by <em>a </em>so 2a + 3a + 4a would give you the total area of the entire large rectangle. 
 
        
             
        
        
        
I believe it's b , hopefully this helps