Drum X is 1/2 full of oil and drum Y, which has twice the capacity of drum X, is 1/2 full of oil. If all of the oil in drum X is poured into drum Y, then drum Y will be filled to what capacity?	Choose the correct choice from the following answers:
A) 2 / 3	B) 3 / 4	C) 4 / 5	D) 5 / 6	E) 7 / 8

Rationale: "( 1 / 2 ) x = ( 1 / 4 ) y ( 1 / 4 ) y + ( 1 / 2 ) y = ( 3 / 4 ) y the answer is b ."
Answer: B