import java.io.BufferedReader;
import java.io.PrintWriter;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.*;

public class A168  implements Runnable{
        
    public static void main(String args[]){
       new A168().run();
    }
    
     public static final String INPUT_FILE = "input.in";
     public static final String OUTPUT_FILE = "output.out";
  
    @Override
    public void run(){
        try{
//        in = new BufferedReader(new FileReader(INPUT_FILE));
//        out = new PrintWriter(new BufferedWriter(new FileWriter(OUTPUT_FILE)));
            in = new BufferedReader(new InputStreamReader(System.in));
            out = new PrintWriter(System.out);
            tok = null;
            solve();
            in.close();
            out.close();
            
        }
        catch(IOException e){
            e.printStackTrace();
            System.exit(0);
        }
    }
    
    int nextInt()throws IOException{
        return Integer.parseInt(nextToken());
    } 
    
    double nextDouble()throws IOException{
        return Double.parseDouble(nextToken());
    }
    
    long nextLong() throws IOException{
        return Long.parseLong(nextToken());
    }
    
    String nextToken()throws IOException{
        while(tok == null || !tok.hasMoreTokens()){
            tok = new StringTokenizer(in.readLine());
        }
        return tok.nextToken();
    }
    
    BufferedReader in;
    PrintWriter out;
    StringTokenizer tok;
    //////////////////////////////////////////////////////////////////
    //////////////////////////////////////////////////////////////////
    
    private void solve()throws IOException{
        int N = nextInt();
        int W = nextInt();
        double p = nextInt();
        
        double persons = (p * N) / 100.;
        if(persons * 100 != p * N)persons++;
        int t = (int)persons - W;
        
        out.println(t);
    }
    
}