ATM help getting wrong answer

import java.util.*;

/ * @author Nitish / class Atm {

public static void main(String[] args) 
{
    // TODO code application logic here
    Scanner in=new Scanner(System.in);
    int y=in.nextInt();
    double balance=in.nextDouble();
    //System.out.println(y+" "+balance);
    if(y%5==0 && y<balance)
    {
        balance = balance - y-0.50;
        System.out.println(balance);
    }
    else if(y>=balance)
    {
        System.out.println(balance);
    }
    else
    {
        System.out.println(balance);
    }
}

}

what is the problem in ans it's showing me wrong answer??