import java.util.*;
public class Main {
    public static void main(String[] args) throws Exception{
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int x = Integer.parseInt(sc.next());
        int y = Integer.parseInt(sc.next());
        int r = (int)(Math.ceil(((float)y/100)*n)-x);
        if (r < 0) {
            System.out.print("0");
        } else {
            System.out.print(r);
        }
        sc.close();
    }
}

		  			  	  	  					     				