18/17 -10/18= 77/153
5 8/9 -3= 2 8/9
7 3/8 - 2 1/8= 5 1/4
6 3/19 - 3/19= 6
13 (18-5) 19/100
1- 10/23= 13/23
5/14- 7/9= 53/126
5 - 7/9= 4 2/9
18/17 -10/18= 77/153
5 8/9 -3= 2 8/9
7 3/8 - 2 1/8= 5 1/4
6 3/19 - 3/19= 6
13 (18-5) 19/100
1- 10/23= 13/23
5/14- 7/9= 53/126
5 - 7/9= 4 2/9