1/6 * 3/5=1/(2*3) * 3/5=1/10
5/9*6/25=(5*3*2)/(3*3*5*5)=2/15
14/16 * 24/49=(2*7*8*3)/(2*8*7*7)=3/7
21/36*32/56=(7*3*4*8)/(6*4*8*7)=3/6=1/2
9/14*49/36=(9*7*7)/(2*7*9*4)=7/8
15/27*9/50=(3*5*9)/(9*3*5*10)=1/10
4/6*18/24=(4*6*3)/(6*6*4)=3/6=1/2
1/16*64/102=(16*2*2)/(16*2*51)=2/51