Answer:8
Step-by-step explanation:
You find the average which is adding them all together then dividing by how many numbers you added. 
 
        
             
        
        
        
Ok any more details or is that the question?
        
             
        
        
        
Domain: All real numbers (-infinity, infinity)
Range: [9, -infinity)
 
        
             
        
        
        
> -1 2/3 ÷ (-2 1/5)
> -1.66.. ÷ -2.2
> 0.75454...
Answer: 0.75