import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int x = Integer.parseInt(sc.next());
        int y = Integer.parseInt(sc.next());
        System.out.print((int)(Math.ceil(((float)y/100)*n)-x));
        sc.close();
    }
}

  		   		  			 	 	 	 				  		 	