1. The reading passage is primarily about the relationship between chickens and humans, focusing on chickens as a food source. 2. To find the ratio of chickens to humans on Earth, we use the given numbers: there are approximately 23 billion chickens and 7 billion humans. 3. An omnivore is an animal that eats both plants and animals. Let's calculate the ratio of chickens to humans: 1. State the problem: Find the ratio of chickens to humans. 2. Use the formula for ratio: $$\text{Ratio} = \frac{\text{Number of chickens}}{\text{Number of humans}}$$ 3. Substitute the values: $$\frac{23,000,000,000}{7,000,000,000}$$ 4. Simplify the fraction by dividing numerator and denominator by 1,000,000,000: $$\frac{\cancel{23,000,000,000}^{23}}{\cancel{7,000,000,000}^{7}} = \frac{23}{7}$$ 5. Convert to a decimal for easier understanding: $$\frac{23}{7} \approx 3.29$$ So, there are approximately 3.29 chickens for every human on Earth.