由数据 9 5 , 16 12 , 25 21 , 36 32 ,…可得规律:分子是,32,42,52,62,72,82,92分母是:1×5,2×6,3×7,4×8,5×9,6×10,7×11…,∴第八个数据是: 102 8×12 = 25 24 ;故答案为: 25 24 .