Java: Looping through and printing based on rounding

I am having trouble figuring out how display a rounded number of asterisks based on their corresponding (numbers on the right of the output) count.

I am attempting to use 1 asterisk to represent 100 asterisks. However, when I get a number such as roll #17 being 417, I want it to print only 4 asterisks, not five. I tried using Math.round() but I was unsuccessful.

I'd really appreciate any help.

My code:

public class Histogram {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        int numRoles = 30000;
        int[] amountRoles = new int[19]; // amountRoles Holds the Array

        for (int i = 3; i < 7; i++) 
        amountRoles[i] = 0; // Set 0
        {
            for (int i = 0; i < numRoles; i++) 
            {
                int die1 = (int)(Math.random()*6+1);
                int die2 = (int)(Math.random()*6+1);
                int die3 = (int)(Math.random()*6+1);
                amountRoles[die1+die2+die3]++; // Increments
            }
            System.out.print("The die was rolled " + numRoles + " times, its six value's counts are:");
            for (int i = 3; i < 7; i++)
            {
                System.out.println(); // Line Holder
            }
        }
        for (int i = 3; i < amountRoles.length; i++) // Iterates through amountRoles
        {
            System.out.print("[" + i + "]" + "  ");
            for(int j = 0; j < amountRoles[i]; j++) // Loop through amountRoles[i]
            {
                if (Math.round(j) % 100 == 0)
                {
                    System.out.print("" + "*");
                }
            }
            System.out.println(" "  + amountRoles[i]);
        }
    }
}

My output:

[3]     ** 139
[4]     **** 389
[5]     ********* 826
[6]     ************** 1366
[7]     ********************* 2082
[8]     ****************************** 2973
[9]     *********************************** 3440
[10]    *************************************** 3859
[11]    ************************************** 3742
[12]    *********************************** 3482
[13]    ****************************** 2918
[14]    ******************** 1996
[15]    ************** 1341
[16]    ********* 865
[17]    ***** 417
[18]    ** 165