1. **State the problem:** Find the percent of change in population from 2000 to 2010. 2. **Formula for percent change:** $$\text{Percent Change} = \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \times 100$$ 3. **Apply the values:** $$\frac{28000 - 19500}{19500} \times 100$$ 4. **Calculate the difference:** $$28000 - 19500 = 8500$$ 5. **Substitute back:** $$\frac{8500}{19500} \times 100$$ 6. **Simplify the fraction:** $$\frac{8500}{19500} = \frac{17}{39}$$ 7. **Convert fraction to decimal:** $$\frac{17}{39} \approx 0.4359$$ 8. **Calculate percent:** $$0.4359 \times 100 = 43.59\% \approx 43.6\%$$ **Final answer:** The population increased by approximately **43.6%** from 2000 to 2010.