2 2/3 = 8/3. 5/8 - 8/24 = 15/24 - 8/24 = 7/24. 1 3/7 = 10/7. 8/3 : 7/24 = 8/3 * 24/7 = 64/7. 2 * 10/7 = 20/7. 64/7 - 20/7 = 44/7 = 6 2/7.