#include <stdio.h>

int main(void){
	while(1){
		double a;
		double b;
		double c;
		double ans;
		scanf("%lf %lf %lf\n", &a, &b, &c);
		if(a==0.0||b==0.0||c==0.0) break;
		ans= c*(100+b)/(100+a);



		if (ans>(int)ans){
			ans = (int)(ans+1);
		}else{
			ans = (int)ans;
		}
		printf("%d\n", (int)ans);
	}
	return 0;
}