mokrushina85 12/27+14/21=4/9+2/3=4/9+6/9=10/9=1, 1/9
14/24-15/40=14/24-3/8=14/24-9/24=5/24
12/18-5/60=2/3-1/12=8/12-1/12=7/12
4/24+3/36=1/6+1/12=2/12+1/12=3/12=1/4

Koput083 12/27+14/21=1,1/9
14/24-15/40=5/24
12/18-5/60=7/12
4/24+3/39=1/4