930 miles to travel with a car that gets 22 miles per gallon. how much will it cost to travel if gas costs 2.03 a gallon?

The answer is:  $ 85.81  .

Explanation:

(1 gal / 22 mi) * (930 mi) = 

(1 gal / 22 mi) * (930 mi / 1) = {the units of "mi" ("miles" cancel out} ;

=  (1 gal/ 22) * (930 / 1)  =  (1 gal * 930) ÷ (22 * 1)  ;
                                    
                                       =  (930 gal) ÷ 22 ;
 
                                       =  (465 / 11) gal  =
            
                                       =  42  3/11 gal = 42.2727272727 gal .

      (456 /11)  gal  * ($ 2.03 / gal) =

         $85.813636363636363581 >  round to:  $85.81 .