1) 7/16 8/49 = 56/784 = 7/982) 4/7 8/9 = 32/633) 56/69 69/77 = 3844/53134) 55/72 40/99 = 2200/7128 = 275/891.
1) 7/16 8/49 = 56/784 = 7/98
2) 4/7 8/9 = 32/63
3) 56/69 69/77 = 3844/5313
4) 55/72 40/99 = 2200/7128 = 275/891.