If 45% of z is 39% 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) 160
C) 100
D) 65
E) 50

Rationale: "( 45 / 100 ) z = ( 39 / 100 ) y and y = ( 75 / 100 ) x i . e . y = ( 3 / 4 ) x i . e . ( 45 / 100 ) z = ( 39 / 100 ) * ( 3 / 4 ) x i . e . z = ( 39 * 3 ) x / ( 45 * 4 ) i . e . z = ( 0.65 ) x = ( 65 / 100 ) x i . e . z is 65 % of x answer : option d"
Answer: D