You can rewrite the decimal as a fraction  and compare the two fractions.  The fractions need to have a common denominator.
You can change the fraction to a decimal and compare.  take the numerator and divide it by the denominator.  
Unless I recognize the decimal as a fraction right away, I find it much easier to write the fraction as a decimal and compare
 
        
             
        
        
        
Answer:
25
Step-by-step explanation:
<ABD=<BDC
Check it out 
 
        
                    
             
        
        
        
Pythagorean theorem a^2+b^2=c^2
        
             
        
        
        
45 Degrees on each side means it is equal, for an "equilateral" triangle.