9/10 5/12 = (95) / (10*12) = 45 / 120 = 3 / 8
3/5 : 11/15 = (3 15) / (5 11) = 45 / 55 = 9 / 11
15 5/6 = (15 5) / 6 = 75 / 6 = 25 / 2 = 12 1/2
9/10 5/12 = (95) / (10*12) = 45 / 120 = 3 / 8
3/5 : 11/15 = (3 15) / (5 11) = 45 / 55 = 9 / 11
15 5/6 = (15 5) / 6 = 75 / 6 = 25 / 2 = 12 1/2