3/4*1/5= 5/7*1/2= 5/9*3/10= 3/5*10*21= 9/11*11/27= 5/7*0= 1*8/19= 7/26*2/3= 3/5*20/15= 2/7*14/19= 8/25*5/16= 13/11*11/13= 26/49*7/13= 17/18*4/17= 14/45*50/21= 36/49*7/12=

3/4*1/5=3\20
5/7*1/2=5\14
5/9*3/10=15\90=1\6
3/5*10*21=630/5=126
9/11*11/27=99\297=1\3
5/7*0=0
1*8/19=8\19
7/26*2/3=14\78=7\39
3/5*20/15=60\75=4/5
2/7*14/19=28\133=4\19
8/25*5/16=40\400=1\10
13/11*11/13=143/143=1
26/49*7/13=182\637=2/7
17/18*4/17=68\306=2/9
14/45*50/21=700\945=20/27
36/49*7/12=252\588=3/7