Answer:
Let's assume the number of people called is "x".
The ratio of successful signups to the number of people called is 0.125, which can also be written as 1/8. Therefore, the number of successful signups can be expressed as (1/8)x.
We know that the salesperson has 25 signups this month, so we can write the equation as:
(1/8)x = 25
To solve for x, we can multiply both sides by 8:
x = 200
Therefore, the salesperson called 200 people this month.