import java.io.IOException;
import java.util.Scanner;

public class AAA {
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int x = sc.nextInt();
		int perc = sc.nextInt();

		int req = (int) Math.ceil((perc / 100.0) * n);
		System.out.println(Math.abs(req - x));
	}
}
