If y > 0, (4y)/20 + (3y)/10 is what percent of y? Choices
A) 40 %  B) 50 %  C) 60 %  D) 70 %  E) 80 %

Rationale: "can be reduced to 2 y / 10 + 3 y / 10 = y / 2 = 50 % answer b"
Answer: B