Use diagrams or the description of equivalent ratios to show thay 2:3,4:6, and 8:12 are equivalent

So

lets say we have

a/b=2a/2b

we know that if we invert one and multiply it by the other (divide them), we get 1 because a/a=1 where a=a

so

2/3 and 4/6 are equivelent because if you divide them we get 12/12=1

2/3 and 8/12 are equivilent because if you divide them we get 24/24=1

and sinde 2/3=4/6 and 2/3=8/12, 2/3=4/6=8/12

they are equivlent