If y > 0, (9y)/20 + (3y)/10 is what percent of y?	Choose the correct choice.
A) 40 %
B) 50 %
C) 60 %
D) 70 %
E) 75 %

Rationale: "can be reduced to 9 y / 20 + 6 y / 20 = 15 y / 20 = 75 % answer e"
Answer: E