at a loding dock , each worker on the night crew loaded 3/4 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
1/2
2/5
3/5
4/5
5/8

The answer is 5/8. Suppose the day crew has five workers. Therefore, the night crew has four workers. Suppose each day crew worker loads one hundred boxes. Therefore, each night crew worker loads seventy-five boxes.

5 * 100 = 500; 4 * 75 = 300; 500 + 300 = 800; 500/800 = 0.625; 0.625 = 5/8.