#include <bits/stdc++.h>
using namespace std;
bool int_check(double);
int main() {
  int n, x, y;
  double num;
  cin >> n >> x >> y;
  double per = (double)(x / n) * 100;
  if (per > y)
    cout << 0 << endl;
  else {
    while (true) {
      int c = y;
      num = (double)(y * n) / 100;
      bool bol = int_check(num);
      if (bol == true) break;
      c++;
      y = c;
    }
    cout << num - x << endl;
  }
  return 0;
}
bool int_check(double num) {
  int n = num;
  if (n - num == 0)
    return true;
  else
    return false;
}
