2) 11/12 5/42 28/45 26/51 22/69
4) 1/2=5/10=16/32=75/150
5/4=20/16=35/28=45/36
27/33=81/99
1/10=6/60=7/70
8/9=24/27=40/45
5) 3/12=1/4 5/12 6/12=1/2 8/12=2/3 9/12=3/4 11/12
3/100 ;15/100=3/20 ;26/100=13/50 ;54/100=27/50 89/100 95/100=19/50
4/360=1/90 22/360=11/180 126/360=7/20 153/360=17/40
2/90=1/45 15/90=1/6 36/90=2/5 75/90=5/6 89/90