13/21
1)In this question, we need to gather the data to better get it.
84 residents are participants out of 136
52 nonresidents out of 136
136 -84 = 52
2) We are assuming that 52 people are nonresidents. So we can write out the following ratio:
[tex]\frac{nonresidents}{residents}=\frac{52}{84}=\mathbf{\frac{13}{21}}[/tex]Note that we have simplified this ratio. That is the answer.