2 целых 1/7 : 2/5= 8/4:7x

Question

2 целых 1/7 : 2/5= 8/4:7x

Answer 1

15/7 : 2:5=2:7х
15/7 * 5/2=2/7x
90/14=2/7x
45/7=2/7x
22.5=x

Answer 2

1/7*5/2=8/4/7х
5/14=8/28х
140х=112
х=0,8