Subject: mathqa
Question: the positive numbers w , x , y , and z are such that x is 25 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 ?
Option: 
A: 20.0 %
B: 16.2 %
C: 24.8 %
D: 23.2 %
Answer: B