To find what percent of the park is the picnic area, we can use the information provided:
- Area of the entire park = 400 square inches
- Area of the picnic area = 100 square inches
Now, to find the percent of the park that is the picnic area, you can use the formula:
\[ \text{Percent} = \left( \frac{\text{Area of the picnic area}}{\text{Area of the entire park}} \right) \times 100 \]
Substituting the known values:
\[ \text{Percent} = \left( \frac{100}{400} \right) \times 100 \]
Calculating this gives:
\[ \text{Percent} = 0.25 \times 100 = 25% \]
Thus, 25% of the park is the picnic area.