Hi I want calculate the division of two column using calculate column process please check my code ans tell me what I missing Error :

Logic Part :

$node = $this->src("mysql")->query($Query)

    ->pipe(new Pivot2D(array(
        "dimensions"=>array(
            "column" => "dateyear",
            "row" => "users_zone_c, address_state, CSCName, engname",
        ),
        "aggregates"=>array(
            "sum" => "quantity_c, JSWithRating, noRating,Average, oneStar, twoStar, threeStar, fourStar, fiveStar,             fiveStartPercent",
        ),
		
    )))

        pipe(new CalculatedColumn(array(
			"Average"=>"{quantity_c}/{JSWithRating}"
	)))
	
	->pipe(new CalculatedColumn(array(
		"fiveStartPercent"=>function($row){
                            return ($row["fiveStar"]*100)/$row["JSWithRating"];
                    }
	)))

    ->pipe($this->dataStore('tat1Field'));  

View Part :

"measures"=>array(

	"quantity_c - sum",
	"JSWithRating - sum",
	"noRating - sum",
	"Average - sum",
	"oneStar - sum",
	"twoStar - sum",
	"threeStar - sum",
	"fourStar - sum",
	"fiveStar - sum",
	"fiveStartPercent - sum",
	
),