1/1 6/8 3/5 10/12 = 5/6 1/3 6/9=2/3 3/5 8/10= 4/5 7/96/9= 2/34/8= 2/4=1/210/16=5/68/10=4/5 8/10=4/510/213/50 ( делила на 20)