if a number x is 10%of y and z,and z is 3 times of y.What % is x of y alone? 1)3.3% 2)2.5% 3)5% 4)4%

Answer 1

z = 3y

x = .1(y+z) = .1(y+3y) = .1(4y)

Take it from there.

Answer 2

i don't understand what is x of y alone ,

Answer 3

It is the relationship of x to y with z factored out.