Answer 
0.22580645161
Step-by-step explanation:
you just have to do 4 3/7 in a calculator
 
        
             
        
        
        
Answer:
its 4
Step-by-step explanation:
 
        
             
        
        
        
If  68  is a prime number, then the only factors it has are  1  and  68.
If it has any other factors besides  1  and  68, then it's NOT prime.
Right away, without any higher math, you can look at just the last digit 
in 68 .  The last digit is '8'.  That tells you that '68' is an even number, 
and THAT tells you that '2' must be one of its factors.  So '68' is not a 
prime number. 
The factors of  68  are  1,  2,  4,  17,  34, and  68 .     
68  has four more factors besides  1  and  68, so it's not a prime number.