a) 2/8 = 1/4, 8/24 = 1/3, 12/28 = 3/7, 45/100 = 9/20б) 12/18 = 2/3, 18/20 = 9/10, 20/24 = 5/6, 24/30 = 4/5в) 25/56, 144/120 = 6/5, 156/128 = 39/32, 396/240 = 33/20
a) 2/8 = 1/4, 8/24 = 1/3, 12/28 = 3/7, 45/100 = 9/20
б) 12/18 = 2/3, 18/20 = 9/10, 20/24 = 5/6, 24/30 = 4/5
в) 25/56, 144/120 = 6/5, 156/128 = 39/32, 396/240 = 33/20