def update_grade_payload_kv(user_id, grade_percent):
    """
    Returns a key/value pair that will be used in the body of a bulk grade update request

    Args:
        user_id (int): The Canvas user ID
        grade_percent (numpy.float64): The percent score of the grade (between 0 and 1)

    Returns:
        (tuple): A key/value pair that will be used in the body of a bulk grade update request
    """
    return (
        "grade_data[{user_id}][posted_grade]".format(user_id=user_id),
        "{pct}%".format(pct=grade_percent * 100)
    )