A marathon is \( \bar{a} 26 \) mile run. If a marathon runner has run 19 miles so far, what percent of the marathon has she completed?

To determine the percentage of the marathon that the runner has completed, follow these steps: 1. **Identify the Total Distance and Distance Run:** - **Total Marathon Distance:** 26 miles - **Distance Run So Far:** 19 miles 2. **Calculate the Percentage Completed:** \[ \text{Percentage Completed} = \left( \frac{\text{Distance Run}}{\text{Total Distance}} \right) \times 100 \] Plugging in the values: \[ \text{Percentage Completed} = \left( \frac{19}{26} \right) \times 100 \approx 73.08\% \] 3. **Conclusion:** The marathon runner has completed approximately **73%** of the marathon.