29. The annual rent collected by a coporation from a certain building was x percent more in 1998 than in 1997 and y percent less in 1999 than in 1998. Was the annual rent collected by the coporation from the building more in 1999 than in 1997? (1) x>y (2) (xy)/100<x-y 答案是B 请问式子是怎麽导出来的呢 --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 219.70.187.82