If 4^x = 8^y, then the value of (x/y)-1 is equal to : Choose the most appropriate option:
A) 1/2  B) 0  C) 1/4  D) 3/4  E) 2/3
4^x = 8^y,   2^2x= 2^3y   so   2x=3y   x/y = 3/2   (x/y)-1 = (3/2)-1= 1/2   1/2NSWER:1/2
<result>A</result>
If 4^x = 8^y, then the value of (x/y)-1 is equal to :