Answer:
34 % of the people must already planning to vote for Wanda
Explanation:
Let there are 100 people in the town
It is given that Wanda will convince 25 % of people vote for her
Now let there are x people who are planning to vote Wanda
Then 100-x people are not planning to vote Wanda
She have to convince 0.25 ( 100-x) people to get 50% of the vote and to win
So [tex]0.25(100-x)+x=50[/tex]
[tex]25+0.75x=50[/tex]
x = 34
So 34 % of the people must already planning to vote for Wanda