2-1 4/5×(1 1/4-1/12)÷6=1 13/20
1 1/4-1/12=5/4-1/12=15-1/12=14/12
=7/6
1 4/5×7/6=9/5×7/6=63/30=21/10
=2 1/10
2 1/10÷6=21/10×1/6=21/60=7/20
2-7/20=1 13/20
