Your process is close!
Since 3/10 and 4/15 is the amount you missed you have to subtract that by 1.
1 - 0.3 = 0.70
1 - 0.26 = 0.74
So, you scored higher on the math quiz.
Hope this helps!
        
             
        
        
        
5.333 OR 5 1/3
just plug it in the calculator
you will get your answer