1) 1 целая 5/12 : 2/15 = 17/12 · 15/2 = (17·5)/(4·2) = 85/8 = 85 : 8
2) 1/8 : 1 целая 7/12 = 1/8 : 19/12 = 1/8 · 12/19 = (1·3)/(2·19) = 3/38 = 3 : 38
1) 1 целая 5/12 : 2/15 = 17/12 · 15/2 = (17·5)/(4·2) = 85/8 = 85 : 8
2) 1/8 : 1 целая 7/12 = 1/8 : 19/12 = 1/8 · 12/19 = (1·3)/(2·19) = 3/38 = 3 : 38