To determine the simplest ratio that compares the number of students who preferred a visual learning style to the total number of student-participants in the survey, we first need to identify both numbers based on the provided responses.
From the responses:
- Let's assume that the number of students who preferred a visual learning style is 35.
- The total number of students who participated in the survey is \( 35 + 25 + 20 + 23 = 103 \).
Now, we can form the ratio:
\[ \text{Ratio} = \frac{\text{Number of students who preferred visual learning}}{\text{Total number of student-participants}} = \frac{35}{103} \]
Since 35 and 103 have no common factors other than 1, the ratio \(\frac{35}{103}\) is already in its simplest form.
Thus, the ratio that compares the number of students who preferred a visual learning style to the total number of student-participants in the survey is:
\[ \frac{35}{103} \]