Use the equation 459/x=85/100. then you cross multiply 459 and 100 to get 45900. after that you divide 45900 by 85 to get x=540
        
                    
             
        
        
        
The ratio 12:20 because you need it to be equal to 3:5. 3 times 4 which makes 12 so you need to multiply 5 with 4 too
        
             
        
        
        
-1 5/11
Step-by-step explanation:
Dividing fractions is easy as pie, flip the second one over then multiply 
 
        
             
        
        
        
 , that is D
, that is D
when multiplying like variables add the exponents
=  =
 = 