The first step to solve this question is to find out what 5/6 of 54000 is. So we multiply 5/6 by 54000. Why? Because there's the word "of" and "of" is usually associated in multiplication. So:
5/6 × 54000 = 45000.
So now we know that 5/6 of 54000 is 45000. So it means that she needs 45000 from senior citizens. But the question doesn't stop there, it also asks us to solve for the amount of votes she needs to win other than senior citizens.
Now we know that 45000 seniors need to vote for her we subtract 45000 to the total amount which is 54000.
54000 - 45000 is 9000.
So it means that she needs 9000 voters other than senior citizens to win the election for city council.