Final answer:
The percent decrease in the population over the last year is approximately 15.85%.
Step-by-step explanation:
To calculate the percent decrease in population, we can use the formula:
Percent Decrease = (Original Population - New Population) / Original Population x 100%
In this case, the Original Population is 328 and the New Population is 276. Plugging these values into the formula, we get:
Percent Decrease = (328 - 276) / 328 x 100% = 52 / 328 x 100% = 0.1585 x 100% = 15.85%.
Therefore, the percent decrease in the population over the last year is approximately 15.85%.