高校问答建行e路通打不开:Math!!!Math~~~~
来源：百度文库 编辑：高校问答 时间：2024/04/27 15:52:05
It took Sam 200 minutes to complete the difficult Sunday Times crossword puzzle. Stanley did the same puzzels in 160 minutes. By what frraction of an hour was Sam's time longer than Stanley?
(200-160)/60=40/60=2/3