2 1/7:2,5=8.4:0,7x 15/7:2 1/2=8 2/5:7/10x 15/7: 5/2=42/5:7/10 15*2/7*5=42*10/5*7x 6/7=12x x=14 2)7 1/3 : 1 5/6=0,6x:0.75 22/3 : 11/6=0.8x 4=0.8x x=5