import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int x=sc.nextInt();
        int y=sc.nextInt();
        System.out.printlf((x<=0||y<0||x>100||y>100)?"Invalid input":(100-(y*100/x))+"%");
    }
}