To find the percentage of the soup that is vegetables, we first need to calculate the total volume of the soup.
Eli adds the following ingredients:
- Vegetables: 3 cups
- Broth: 4 cups
- Chicken: 1 cup
- Noodles: 2 cups
Now, let's calculate the total volume:
\[ \text{Total volume} = 3 + 4 + 1 + 2 = 10 \text{ cups} \]
Next, we find the percentage of the soup that is vegetables. The formula for percentage is:
\[ \text{Percentage} = \left( \frac{\text{part}}{\text{whole}} \right) \times 100 \]
In this case, the "part" is the volume of vegetables (3 cups) and the "whole" is the total volume of the soup (10 cups):
\[ \text{Percentage of vegetables} = \left( \frac{3}{10} \right) \times 100 = 30% \]
Therefore, 30% of the soup is vegetables.