import java.util.Scanner;

/**
 *
 * @author Artem
 */
public class JavaApplication1 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int x = in.nextInt();
        int y = in.nextInt();
        float p = (float) (y / 100.0);

        float m = n * p;
        if (x < m) {

            m = m - (float) x;
            y = (int) m;
            if ((int) (m) != m) {
                System.out.print(y + 1);
                return;
            } else {
                System.out.print(y);
                return;
            }
        }
        if (x >= m) {
            System.out.print("0");
            return;
        }
           
    }
            
       

}
