import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.StringTokenizer;

public class Main {
    class Pair{
        public long first;
        public long second;
    }
    public static boolean isValid(long a, long b, long c) {
        return a < b + c && b < a + c && c < b + a;
    }
    public static void main(String[] args) throws IOException {
        Scanner scan = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);
        int n = scan.nextInt(), x = scan.nextInt(), y = scan.nextInt();
        int f = (int)Math.ceil((double) n * (double) y / 100);
        out.println(Math.max(0, f - x));
        out.flush();
        out.close();
    }
    static class Scanner 
    {
        StringTokenizer st;
        BufferedReader br;
 
        public Scanner(InputStream s){  br = new BufferedReader(new InputStreamReader(s));}
 
        public String next() throws IOException 
        {
            while (st == null || !st.hasMoreTokens()) 
                st = new StringTokenizer(br.readLine());
            return st.nextToken();
        }
 
        public int nextInt() throws IOException {return Integer.parseInt(next());}
 
        public long nextLong() throws IOException {return Long.parseLong(next());}
 
        public String nextLine() throws IOException {return br.readLine();}
 
        public double nextDouble() throws IOException
        {
            String x = next();
            StringBuilder sb = new StringBuilder("0");
            double res = 0, f = 1;
            boolean dec = false, neg = false;
            int start = 0;
            if(x.charAt(0) == '-')
            {
                neg = true;
                start++;
            }
            for(int i = start; i < x.length(); i++)
                if(x.charAt(i) == '.')
                {
                    res = Long.parseLong(sb.toString());
                    sb = new StringBuilder("0");
                    dec = true;
                }
                else
                {
                    sb.append(x.charAt(i));
                    if(dec)
                        f *= 10;
                }
            res += Long.parseLong(sb.toString()) / f;
            return res * (neg?-1:1);
        }
 
        public boolean ready() throws IOException {return br.ready();}
 
 
    }
}
