#include <stdio.h>

int main() {
    int a, b;
    if (scanf("%d %d", &a, &b) !=2) {
        printf("Invalid input");
        return 0;
        
    }
    
    if (a <=0 || b <0) {
        printf("Invalid input");
    } else: {
        int percent = (b * 100) / a;
        printf("%d%%", percent);
    }
    
    return 0;

}