1. **State the problem:** Officer Brimberry wrote 8 tickets last week and 3 tickets this week. We need to find the percent decrease in the number of tickets. 2. **Formula for percent decrease:** $$\text{Percent Decrease} = \frac{\text{Original Value} - \text{New Value}}{\text{Original Value}} \times 100\%$$ 3. **Apply the values:** $$\text{Original Value} = 8, \quad \text{New Value} = 3$$ 4. **Calculate the difference:** $$8 - 3 = 5$$ 5. **Calculate the fraction:** $$\frac{5}{8}$$ 6. **Show cancellation step:** $$\frac{\cancel{5}}{8} = \frac{5}{8}$$ (no common factors to cancel) 7. **Convert to decimal:** $$\frac{5}{8} = 0.625$$ 8. **Convert to percent:** $$0.625 \times 100\% = 62.5\%$$ 9. **Round to nearest tenth:** The answer is already at one decimal place. **Final answer:** The percent decrease is **62.5%**.