#include <stdio.h>

int main() {
    int c = 0;
    int d = 0;
    char percentage_sign = '%';
    scanf("%d %d",&c,&d);
    float mortality_rate = (float)d/c/1.0*100;
    printf("%.3f",mortality_rate);
    printf("%c",percentage_sign);
    return 0;
}