Respuesta :

1/5 is your answer 
Happy to assist you with you math!
It does represent 20%. How could you know it? Well, if 10 out of 100 is 10%, 10 out of 50 is 20%. But also, you can do. 50 ------ 100%            
                                                                   10 ------  x            So: 50x=1000 x=20%