5 - 2 1/3 = 15/3 - 7/3 = 8/3
5 11/12 - 3 5/6 = 71/12 - 23/6 = 71/12 - 46/12 = 25/12
8/3 * 25/12 = 2/3 * 25/3 = 50/9