#include <bits/stdc++.h>
#define For(i, a, b) for(int (i)=(a); (i)<(b); ++(i))
#define rFor(i, a, b) for(int (i)=(a)-1; (i)>=(b); --(i))
#define rep(i, n) For((i), 0, (n))
#define rrep(i, n) rFor((i), (n), 0)
#define fi first
#define se second
using namespace std;
typedef long long lint;
typedef unsigned long long ulint;
typedef pair<int, int> pii;
typedef pair<double, double> pdd;
typedef pair<lint, lint> pll;
typedef complex<double> xy_t;
template<class T>bool chmax(T &a, const T &b){if(a<b){a=b; return true;} return false;}
template<class T>bool chmin(T &a, const T &b){if(a>b){a=b; return true;} return false;}

constexpr lint mod = 1e9+7;
constexpr lint INF = mod*mod;
constexpr int MAX = 100010;

lint P, Q, A;

bool check(lint x){
    return P*x/100 < Q*x/100+A;
}

int main(){
    cin>>P>>Q>>A;
    if(P==Q){
        if(A==0) cout<<0<<"\n";
        else cout<<mod-7<<"\n";
    }
    else if(P>Q){
        int ans=0;
        for(lint x=1; x<MAX*100; ++x) ans+=check(x);
        cout<<ans<<"\n";
    }
    else{
        int ans=mod-7;
        for(lint x=1; x<MAX*100; ++x) ans-=!check(x);
        cout<<ans<<"\n";
    }
}