created a new column in datastore based on existing columns

 $new_delay_count = $this->dataStore("delay_count")->process(new CalculatedColumn(array(
            "ratio"=>array(
                "exp"=>"{delay_count}*100/{all_count}",
                "type"=>"number",
                "decimals"=>2
                
            ))));;?>

Setting properties to that column

"ratio"=>array(

            "label" => "النسبة",                    
            "cssStyle"=> "width:100px",
            
            "type"=>"number",
            "decimals"=>2,                                                                                                   //eg $value=20.1234556789
            "formatValue"=>function($value)
            {   
                $color = $value>20?"#e83e8c":"#000000";
                return "<span style='color:$color'>".$value."</span>";
            }    ,
        
            

        ),

I have tried "type"=>"number", "decimals"=>2, in column property, during column creation , also both together as shown here. tried $value/10000000=it is giving exponent values.

It is enough to use table instead of datagrid. but still decimal places causing error

oh.ok. I resolved it with php round() function. may be i should try this. Thank you for the support.