To determine the relative frequency of seventh-graders who prefer mountains, you can use the following formula:
\[ \text{Relative Frequency} = \frac{\text{Number of 7th Graders who prefer Mountains}}{\text{Total Number of 7th Graders}} \]
From the table, we can see:
- Number of 7th graders who prefer mountains: 40
- Total number of 7th graders: 110
Now plug in the numbers:
\[ \text{Relative Frequency} = \frac{40}{110} \approx 0.3636 \]
To find the percentage, multiply by 100:
\[ 0.3636 \times 100 \approx 36.36% \]
Rounding to the nearest tenth, we get:
\[ \text{Relative Frequency} \approx 36.4% \]
Therefore, the answer is:
36.4%