0.66:13.2=броби 66/100:132/10 66/100*10/132 =сокращаем 1/10*1/2=1/20=0.05 8.74+0.05=8.79 8.79*0.31=2.7249
0.77:15.4=77/100:154/10 77/100*10/154 сокращаем 1/10*1/2=1/20=0.05 9.68-0.05=9.63 9.63*4.2=40.446