15/7 * 32/15 = 32/7=4 4/7
20/9 * 99/40 = 11/2 = 5 1/2
21/10 * 15/7 = 9/2 = 4 1/2
25/6 * 7/5 = 35/6 = 5 5/6
15/7 * 32/15 = 32/7=4 4/7
20/9 * 99/40 = 11/2 = 5 1/2
21/10 * 15/7 = 9/2 = 4 1/2
25/6 * 7/5 = 35/6 = 5 5/6