 import java.util.Scanner;
 
 public class Main {
 
     public static void main (String[] args) throws Exception{

     int i = 0;
     int clonecount = 0;
     boolean end = false;
    
     Scanner input = new Scanner(System.in);
     int n = input.nextInt();
     int x = input.nextInt();
     int y = input.nextInt();
    
     while (!end) { 
	     float percent = (((float)x / (float)n) * 100); 
   		 if (percent < y) {  
   		 	x += 1;
    		++clonecount;
     	}
     	//else if (percent >= y) { 
     	else{
     		end = true; 
     	}
     	//else {
     		//System.out.print("boo");
     	//}
    
     }
     System.out.println(clonecount);  
     }
     
}
			    			 		 				   		 		 		 	