Posted by Anon on .
if x is r percent of y and if k is s percent y, then x is what percent of k?
100(r+s)%
100/rs%
100r/s%
100s/r%
rs/100%

Math 
Steve,
x/y = 100r
k/y = 100s
y = x/100r = k/100s
so,
x/k = 100r/100s = r/s
or 100r/s%