Answer:
We do not have sufficient information
Explanation:
From this question we do not have sufficient information to test how significant this claim by the mayor is. This mayor has only given us the estimated proportion of the drop in unemployment rate. We will need to have more data to carry out hypothesis testing but these were not given.
Here is an example
Let's say n = size = 500
and 51% are unemployed
51/500*100 = 10.2%
The size of the population is what would tell us if the change from 10.5 to 10.4 percent is significant or not.