6/11*4/7= 7/20*10/21= 8/9*27/32= 23/28*49/46= 34/86*43/51= 7/18*90/77= 63/64*48/91= 19/100*5/38=
6/11*4/7=24/77 7/20*10/21=1/2*1/3=1/6 8/9*27/32=1/1*3/4=3/4 23/28*49/46=1/4*7/2=7/8 34/86*43/51=17/43*43/51=1/1*1/3=1/3 7/18*90/77= 63/64*48/91= 19/100*5/38=
6/11*4/7=24/77 7/20*10/21=1/2*1/3=1/6 8/9*27/32=1/1*3/4=3/4 23/28*49/46=1/4*7/2=7/8 34/86*43/51=17/43*43/51=1/1*1/3=1/3 7/18*90/77=1/1*5/11=5/11 63/64*48/91=9/4*3/13=27/52 19/100*5/38=1/20*1/2=1/40