14/21 = 2/3 (на7)
12/30=2/5 (на6)
24/60=4/10 (6) =2/5 (2)
35/105=7/21 (5)=1/3 (7)
55/77=5/7 (11)
81/270=9/30 (9)=3/10 (3)
75/450=5/30 (15)
135/180=27/36(5)=3/4 (8)
14/21 = 2/3 (на7)
12/30=2/5 (на6)
24/60=4/10 (6) =2/5 (2)
35/105=7/21 (5)=1/3 (7)
55/77=5/7 (11)
81/270=9/30 (9)=3/10 (3)
75/450=5/30 (15)
135/180=27/36(5)=3/4 (8)