def find_percentages(billable_hours, internal_hours, total_hours):
    """
    Take total billable, internal, hours to find out the percentages of each.
    """
    billable_percent = 0.0
    internal_percent = 0.0
    if total_hours > 0:
        billable_percent = round(billable_hours/total_hours*100, 1)
        internal_percent = round(internal_hours/total_hours*100, 1)
        utilizable_percent = round((billable_percent + internal_percent), 1)
        return [billable_percent, internal_percent, utilizable_percent]
    return [0.0, 0.0, 0.0]