If 45% of z is 72% of y and y is 75% of x, what percent of x is z? Choose the correct choice from the following choices:
A) 200 B) 120 C) 100 D) 65 E) 50
(45/100)z = (72/100)y   and y = (75/100)x i.e. y = (3/4)x   i.e. (45/100)z = (72/100)*(3/4)x   i.e. z = (72*3)x/(45*4)   i.e. z = (1.2)x = (120/100)x   i.e. z is 120% of x   Answer: Option 120
<result>B</result>
If 45% of z is 72% of y and y is 75% of x, what percent of x is z?