This is a trapezium with congruent unparallel lines.
 
        
        
        
What is the complete question?
        
             
        
        
        
(4/5)-(3/8)=17/40 or 0.425 mile
        
             
        
        
        
An equation that sets two fractions equal to each other is called a proportion. A proportion is a name we give to a statement that two ratios are equal. When two ratios are equal, then the cross products<span> of the ratios are equal. Hope this helps.</span>