1) (4/21) (7/16) = 28/336 = 1/122) 3 (5/9) = 15/9 = 5/33) 4 1/5 2 1/7 = 21/5 15/7 = 315/35 = 94) 1 7/8 1 1/9 1 23/25 = 15/8 10/9 48/25 = 1800/180 = 10
1) (4/21) (7/16) = 28/336 = 1/12
2) 3 (5/9) = 15/9 = 5/3
3) 4 1/5 2 1/7 = 21/5 15/7 = 315/35 = 9
4) 1 7/8 1 1/9 1 23/25 = 15/8 10/9 48/25 = 1800/180 = 10