Step 1: Total number of votes.
Chauncy received 1,618 votes, which represents 20 percent of the total votes. Let the total number of votes be \( V \). We can write the equation:
\[
\frac{20}{100} \times V = 1,618.
\]
Solving for \( V \):
\[
V = \frac{1,618 \times 100}{20} = 8,090 \, \text{votes}.
\]
Step 2: Calculate the number of votes required for 30 percent.
In order to win 30 percent of the total votes, Chauncy would need:
\[
\frac{30}{100} \times 8,090 = 2,427 \, \text{votes}.
\]
Step 3: Calculate the number of remaining votes.
The remaining votes are the total votes minus the votes Chauncy already received:
\[
\text{Remaining votes} = 8,090 - 1,618 = 6,472 \, \text{votes}.
\]
Step 4: Calculate the additional votes needed.
Chauncy needs \( 2,427 - 1,618 = 809 \) additional votes to reach 30 percent of the total votes.
Step 5: Calculate the percentage of remaining votes needed.
The percentage of the remaining votes that Chauncy needs to win is:
\[
\frac{809}{6,472} \times 100 \approx 12.5%.
\]
Conclusion:
Thus, Chauncy would need to receive approximately 12.5% of the remaining votes in order to win 30 percent of the total votes. The correct answer is (B) 12.5%.