4 1/6*0,6=25/6*6/10=5/2 3 2/5:1 1/7=17/5*7/8=119/40 5/2+119/40=100/40+119/40=219/40= 5, 475 5,475+6,7=12,175
4 1/6*0,6=25/6*6/10=5/2 3 2/5:1 1/7=17/5*7/8=119/40 5/2+119/40=100/40+119/40=219/40= 5, 475 5,475+6,7=12,175