We need to assume that CD is perpendicular to AB.
6/5 = AB/6
AB = 36/5
AB = 7.2
        
             
        
        
        
Answer:
67%
Step-by-step explanation:
There are a few methods to finding the percent of a number.  You can use proportions: 

The 'percent' is the percent of the fraction that you are looking for, or 48/72. 
Cross-multiply:  72x = (48)(100) or 72x = 4800
Divide both sides by 72:  72x/72 = 4800/72
Solve for 'x':  x = 66.6666...
Round 66.666.... to the nearest percent: 67%
 
        
             
        
        
        
Your answer is 0.03 because you have to make the 5 equal to the ten and that would be 10 then change the division to multiplication and just multiply across then you simplify it.