Below i have add new ajax request url in code. please review it

    jQuery( "#margin_percent" ).change(function() {     
        var $_this = jQuery( this );
        var store_id = 0;
        /* margin is controller name. file name is like "marginController.php" & getPercent is function */
        new Ajax.Request('ajaxdata/margin/getPercent/', {
            method: 'post',
            parameters: {
                storeId: store_id,
                margin: $_this.val(),
                productId: jQuery('#productcreator_product_id').val(),
            },
            onSuccess: function (transport) {
                var response = JSON.parse(transport.responseText);
    
                jQuery("#special_price").val(response['special_price']);
            },
            onFailure: function () {
    
            }
        });
    });