Function giving incorrect result

I know something is wrong with my variables storing the info.

At the end of the program, it prints 0.0 for rate.

I have been trying to figure out the error in logic or syntax in my program. I believe it may have something to do with the variables being 0, I have also tried inserting the function into the loop when count == floor.

import javax.swing.*;

public class pickanumber {
  public static void main(String[] args) {
    int floor=1, rooms, occupants, rsum = 0, osum = 0;
    String amount;

    do {
      amount = JOptionPane.showInputDialog("Enter total floors.");
      floor = Integer.parseInt(amount);
    } while (floor <= 0);

    for (int count = 1; count <= floor; count++) {
      if (floor==13) count++;

      do {
        amount = JOptionPane.showInputDialog("Enter total rooms on floor "+count+".");
        rooms = Integer.parseInt(amount);
      } while(rooms <= 9);

      rsum += rooms;

      do {
        amount = JOptionPane.showInputDialog("Enter occupants on floor "+count+".");
        occupants = Integer.parseInt(amount);
      } while ((occupants > rooms)||(occupants < 0));

      osum += occupants;
    }

    int rate = (osum/rsum)*100;
    JOptionPane.showInputDialog("occupancy is at "+rate+"% capacity.");
  }
}