
import java.util.Scanner;

/**
 *
 * @author Aly Taha
 */
public class NewClass {

    public static void main(String[] args) {
        Scanner k = new Scanner(System.in);
        int n = k.nextInt();
        int m = k.nextInt();
        int l = k.nextInt();
        double res = (double) l / 100;
        double res2 = res * n;
        if (Math.floor(res2) == m && res2>m) {
            System.out.println("1");
        } else {
            int res3 = (int) res2 - m;
            System.out.println(res3);
        }
        
    }
}
