你好!8\3( )9\4是8分之3和9分之4吧正确的写法应该是 3/8 和 4/9 (分子在前分母在后) 3/8 = 27/72 4/9 = 32/72所以 3/8 < 4/91/2 = 8/16所以 7/16 < 1/23/8 = 21/564/7 = 32/56所以 3/8 < 4/7