#include <bits/stdc++.h>
using namespace std;
int main() {
  double num1, num2, ans;
  float n, x, y;
  int res;
  cin >> n >> x >> y;
  num1 = x / n;
  num2 = y / 100;
  ans = (num2 - num1) * n;
  res = ans;
  if (num2 > num1) {
    double sum = ans - res;
    if (sum > 0) {
      res++;
      cout << res;
    } else {
      cout << res;
    }
  } else {
    cout << 0;
  }
  return 0;
}
