At a loading dock, each worker on the night crew loaded 1/2 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 choice from the following options
A) 1/2 B) 2/5 C) 3/5 D) 4/5 E) 5/7
Method: X = No. of boxes loaded by day crew.   Boxes by night crew = 1/2 * 4/5 X = 2/5 X   % loaded by day crew = X/(X + 2/5X) = 5/7   Answer 5/7
<result>E</result>
At a loading dock, each worker on the night crew loaded 1/2 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?