+---------------+--------+
| business_name | rating |
+---------------+--------+
| McDonald's    |    3.9 |
| Subway        |    4.1 |
| Pizza Hut     |    4.3 |
| TGI Friday's  |        |
| Domino's      |    3.8 |
| Checker's     |        |
+---------------+--------+

$args = [
            'post_type'         => 'business',
            'posts_per_page'    => 10,
            'paged'             => 0,
            'meta_query'        => [
                                        [
                                            'key' => 'state',
                                            'value' => $stateName
                                        ]
                                    ],
            'order'         => 'DESC',
            'orderby'       => 'meta_value_num',
            'meta_key'      => 'rating'
        ];

$query = new WP_Query( $args );