import java.util.Scanner;

public class Main{
    public static void main(String [] args){
        Scanner s = new Scanner(System.in);
        int citizens = 0, wizards = 0;
        int percent = 0;
            citizens = s.nextInt();
            wizards = s.nextInt();
            percent = s.nextInt();
        percent = percent/100;
        int required = percent*citizens;
        int clones = (required - wizards);
        System.out.println(clones);
    }
}
	 	 			 	 	   		 					 			 	  	