def _db_to_decimal(db_number):
    if db_number is None:
        return None

    return Decimal(int(db_number)) / 100


def _decimal_to_db(decimal_number, currency=True):
    if decimal_number is None:
        return None

    if currency:
        decimal_number = decimal_number.quantize(Decimal('.01'), rounding=ROUND_CEILING)

    return int(decimal_number * 100)