7/15*5/7 в действиях

Действия делю по скобкам.

1) 2. 1/5-1. 5/6 = 11/5-11/6 = 66/30-55/30=11/30;

2) 4. 29/60-11/30 = 269/60-11/30 = 269/60-22/60 = 247/60;

3) 7. 1/12-247/60 = 85/12-247/60=425/60-247/60=178/60;

4) 5. 7/15-178/60 = 82/15-178/60 = 328/60-178/60=150/60 = 15/6 = 5/2 = 2 целых 1/2