percents

(x/(5 x))/5

Cancel terms. (x/5)/(5 x) = 1/25:

 1/25% = 4%

5x * p  = x/5       divide both sides by 5x

p  =   x / [ 5*5x]       simplify

p  = 1/ 25    =  4/100   =   4%  

Thanks so much! 

Sol: 5x=100%

x=20%, so 20%/5=4%