import java.util.Scanner;


public class A {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n =  in.nextInt();
        int x = in.nextInt();
        int y = in.nextInt();
        float sum = (y*n)/100.0f;
        if(sum - x < 0.0){
            System.out.println(0);
        }else{
            System.out.println((int)(Math.ceil(sum-x)));
        }
    
        
    }
}
