24 foot board... I added a picture for the break down
 
        
             
        
        
        
20% in fraction form is....
1) 20 is the percent
2)to put it in a fraction form.......
3) you need to divide it by 100.
4) 20 /100 equals 0.2
5) 0.2 says it's out of 2/10
6) if you want to simplify you can so go ahead: 2/10 >>> (turns into) 1/5
7) 1/5 is your answer...
8) PLEASE GIVE THIS A THANKS AND THE BRAINIEST ANSWER/CROWN...IF NOT...WELL PLEASE DO :) :) :) :) :D :D :D ;D:D 
        
                    
             
        
        
        
The answer is 19 units number 3