import java.io.BufferedReader;
//import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;

import java.util.Arrays;
import java.util.Locale;
import java.util.StringTokenizer;

public class Main {
	static BufferedReader input;

	static StringTokenizer _stk;

	static String readln() throws IOException {
		String l = input.readLine();
		if (l != null)
			_stk = new StringTokenizer(l, " ");
		return l;
	}

	static String next() {
		return _stk.nextToken();
	}

	static int nextInt() {
		return Integer.parseInt(next());
	}
	
	static void dbg(Object... o) {
		System.out.println(Arrays.deepToString(o));
	}

	public static void main(String[] args) throws IOException {
		Locale.setDefault(Locale.US);
		input=new BufferedReader(new InputStreamReader(System.in));
//		input = new BufferedReader(new FileReader("WizardsAndDemonstration"));
		
		int n=0, x=0, y=0, resp=0;
		
		readln();

		n=nextInt();
		x=nextInt();
		y=nextInt();
		
		resp=(int)Math.ceil((double)y*n/100)-x;
		
		System.out.println(resp);

	}
}
