// editor1
#include<stdio.h>
int main () {
int total,current;
scanf("%d %d", &total,&current);
if (total < 0 || current < 0) {
    printf ("Invalid input");
    return 0;
}
int reamining = total - current;
int percent = (remaining * 100) / total;
printf("%d%%",percent);
return 0;
}