6-3 4/18= 6/6+7/7= 20+25/17+11= 1+3/11=
6-3 4/18=108/18-58/18=50/18=2 14/18=2 7/9 6/6+7/7=1+1=2 20+25/17+11=31+25/17=31+1 8/17=32 8/17 1+3/11=1 3/11