Posted by **sarah** on Saturday, July 27, 2013 at 6:26am.

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%

- math -
**PsyDAG**, Saturday, July 27, 2013 at 12:38pm
z = 3y

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

Take it from there.

- math -
**sarah**, Sunday, July 28, 2013 at 1:54am
i don't understand what is x of y alone ,

- math -
**PsyDAG**, Sunday, July 28, 2013 at 12:47pm
It is the relationship of x to y with z factored out.

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