import java.util.*;
public class A14 
{

    public static void main(String[] args) 
    {
        Scanner in = new Scanner(System.in);
        int number_intown = in.nextInt();
        int number_volsh = in.nextInt();
        int percent = in.nextInt();
        
        double a = 100.0/number_intown;
        a = percent / a;
        double result = Math.abs(a - number_volsh);
        result = Math.ceil(result);
        System.out.println((int)result);
    }

}
