Halloween candy round/ceil

Question

import java.util.Scanner;

public class Program
{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int houses = input.nextInt();

int bill=2;
double proba;
//your code goes here
do {

if (houses<3)
System.out.println ("error");
} while (houses<3);
{
proba=(double) bill / (double) houses;
proba*=100;
proba=Math.ceil(proba);
System.out.println ((int)proba);
}
}
}
Hello everyone I have a question about this problem.
With this code I passed the test but I don't understand why I have to use Math.ceil and not Math.round (it fail with the 3 last inputs).
Thanks

Answer 1

Ok so the probleme was my level of english ^^. I thought rounded up to the nearest meant nearest up or down.
Problem solved I need to be more careful when I'm reading something not in my mother tongue.
Thank you !