The group
represents equivalent ratios.
Answer: Option B
Explanation:
As we see carefully, the equation B represents the equivalent ratio. Because if you divide the 7 by 10 then you will get 0.7 and this 0.7 can also be written as 70% in percentage form. So, the correct answer is Option B.
Case A:

It can be written as that 0.75, 0.5, 0.8.this group does not represent equivalent ratios
Case B:

If you divide the 7 by 10 then you will get 0.7 and this 0.7 can also be written as 70% in percentage form. This group represents equivalent ratios
Case C:

It can writes as that 0.7,0.7.0.25 so this group does not represent equivalent ratios
Case D:

This gives 0.7, 0.14, 0.7 so this group does not represent equivalent ratios.