(11,25-3 5/12+4,3-7 19/30):(7 7/12-5 5/6)=3 138/190
1. 11,25-3 5/12=11 25/100-3 5/12=11 1/4-3 5/12=11 3/12-3 5/12=
=10 15/12-3 5/12=7 10/12
2. 7 10/12-4 3/10=7 5/6-4 3/10=7 25/30-4 9/30=3 16/30
3. 3 16/30-7 19/30=5 27/30=5 9/10
4. 7 7/12-5 5/6=7 7/12-5 10/12=6 19/12-5 10/12=1 7/12
5. 5 9/10:1 7/12=59/10:19/12=59*12/10*19=708/190=3 138/190