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));
        
        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;
        
        if(resp<0) resp=0;
        
        System.out.println(resp);

    }
}
