1. **Problem:** Zalmon walks 3/4 of a mile in 3/10 of an hour. What is his speed in miles per hour? 2. **Formula:** Speed is calculated as distance divided by time: $$\text{Speed} = \frac{\text{Distance}}{\text{Time}}$$ 3. **Substitute values:** $$\text{Speed} = \frac{\frac{3}{4}}{\frac{3}{10}}$$ 4. **Divide the fractions:** $$\text{Speed} = \frac{3}{4} \times \frac{10}{3}$$ 5. **Simplify by canceling common factors:** $$\text{Speed} = \cancel{\frac{3}{\cancel{4}}} \times \frac{10}{\cancel{3}} = \frac{10}{4}$$ 6. **Simplify the fraction:** $$\frac{10}{4} = \frac{5}{2} = 2.5$$ 7. **Answer:** Zalmon's speed is 2.5 miles per hour. **Final answer: C 2.5 miles per hour**