(12 4/5*3 3/4-4 4/11*4 1/8)/(11 2/3÷2 4/7)= 6 30/49
1) 12 4/5*3 3/4-4 4/11*4 1/8=64/5*15/4-48/11*33/8= 16/1*3/1-6/1*3/1=48-18=30
2)11 2/3÷2 4/7= 35/3÷18/7= 35/3*7/18=245/54
3) 30÷ 245/54= 30*54/245= 6*54/49= 324/49=6 30/49
