13\18-5\24,1-1\8,11\63-1\9
1) 13/18-5/24=52/72-15/72=37/72 2) 1-1/8=8/8-1/8=7/8 3) 11/63-1/9=11/63-7/63=4/63
13/18-5/24=52/72-15/72=37/72 1-1/8=8/8-1/8=7/8 11/63-1/9=11/63-7/63=4/63