1) 5/8 4/15 = 20/120 = 1/6 ab;2) 6 3/4 1 11/45 = 27/4 56/45 = 756/180 = 21/5 xy;3) 13/24 32 = 416/24 = 52/3 dc;4) 18 1/3 1 2/11 9/13 = 55/3 23/11 9/13 = 1485/39 abc.
1) 5/8 4/15 = 20/120 = 1/6 ab;
2) 6 3/4 1 11/45 = 27/4 56/45 = 756/180 = 21/5 xy;
3) 13/24 32 = 416/24 = 52/3 dc;
4) 18 1/3 1 2/11 9/13 = 55/3 23/11 9/13 = 1485/39 abc.