I feel the easiest way to answer this question would be the rewrite the equation as 32/48x^5 • x^7 
Since you are dividing the expressions, you would divide 32 by 48 
Then you add the exponents together since they are like terms of x. 
So far you would have: 
32/48x^12 
You could then simply 32/48 to 2/3 
Then you get the answer: 
2/3x^12