Final answer:
The equivalent ratio of 8:40 in simplest terms is 1:5.
Step-by-step explanation:
When finding an equivalent ratio, we need to simplify the given ratio to its simplest form.
In the ratio 8:40, both numbers can be divided by 8 to simplify the ratio.
Dividing 8 by 8 gives us 1, and dividing 40 by 8 gives us 5.
Therefore, the equivalent ratio in simplest terms is 1:5.