The positive numbers w, x, y, and z are such that x is 20 percent greater than y, y is 20 percent greater than z, and w is 20 percent less than x. What percent greater than z is w ?  Options
A) 15.2%  B) 16.0%  C) 20.0%  D) 23.2%  E) 24.8%
y = 100 (start with yy, it makes getting x easier).   x = y*1.2 = 120   z = y/1.2 = 83.33   w = x*0.8 = 96   Then for the answer:   (w-z)/z = (96 - 83.33)/83.33   = 15.2%   15.2%NSWER:15.2%
<result>A</result>
The positive numbers w, x, y, and z are such that x is 20 percent greater than y, y is 20 percent greater than z, and w is 20 percent less than x. What percent greater than z is w ?