#include <stdio.h>


int main(){
    int n,m;  //初始具有n元，每次投入m元
    float p;   //每次回收p%
    int t,count;
    scanf("%d",&t);
    while(t){
        count =0;
        scanf("%d%d%f",&n,&m,&p);
            p=p/100;
        while(m<=n){
            n=(n-m)+(m-m*p);
            count++; 
        }
        t--;
        printf("%d\n",count);
    }
     
}