Divide both sides of the equation by the same term
7/100=100z/100
Simplify
Cancel the terms that are in both The numerator and the denominator
Move the variable to the left
Z=7/100
I think that it was 70 before
8.64
thats 12% of 72
hope this helps :]
(N instead of X for variable)
N x 7 < 21