#include <bits/stdc++.h>

#define fi first
#define se second
#define DB double
#define U unsigned
#define P std::pair
#define LL long long
#define LD long double
#define pb emplace_back
#define MP std::make_pair
#define SZ(x) ((int)x.size())
#define all(x) x.begin(),x.end()
#define CLR(i,a) memset(i,a,sizeof(i))
#define FOR(i,a,b) for(int i = a;i <= b;++i)
#define ROF(i,a,b) for(int i = a;i >= b;--i)
#define DEBUG(x) std::cerr << #x << '=' << x << std::endl

int main(){
    int a,b;scanf("%d%d",&a,&b);
    printf("%.10f\n",100-100.0*b/a);
    return 0;
}

#include<bits/stdc++.h>
using namespace std;

int main()
{
    long double n,m;
    cin>>n>>m;
    long double d=n-m;
    long double e=d/n;
    long double f=e*100;
    cout<<f;
    return 0;
}