At a loading dock, each worker on the night crew loaded 1/4 as many boxes as each worker on the day crew. If the night crew has 4/5 as many workers as the day crew, what fraction of all the boxes loaded by the two crews did the day crew load?
Choose the correct option
A) 1/2  B) 2/5  C) 3/5  D) 4/5  E) 5/6
Method: X = No. of boxes loaded by day crew.   Boxes by night crew = 1/4 * 4/5 X = 1/5 X   % loaded by day crew = X/(X + 1/5X) = 5/6   Answer 5/6
<result>E</result>
At a loading dock, each worker on the night crew loaded 1/4 as many boxes as each worker on the day crew. If the night crew has 4/5 as many workers as the day crew, what fraction of all the boxes loaded by the two crews did the day crew load?