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