import java.util.Scanner;
import java.io.OutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
	public static void main(String[] args) {
		InputStream inputStream = System.in;
		OutputStream outputStream = System.out;
		Scanner in = new Scanner(inputStream);
		PrintWriter out = new PrintWriter(outputStream);
		TaskA solver = new TaskA();
		solver.solve(1, in, out);
		out.close();
	}
}

class TaskA {
    public void solve(int testNumber, Scanner in, PrintWriter out) {
        int citizens = in.nextInt();
        int wizards = in.nextInt();
        int percentageneeded = in.nextInt();
        int temp = citizens* percentageneeded;
        int peopleneeded = (int) Math.ceil((double)temp/100);
        int pupetsneeded = peopleneeded-wizards;
        out.print(pupetsneeded > 0 ? pupetsneeded: 0);

    }
}

