Get Price For Configurable Product Magento 2

 if you try getFinalPrice(); for simple product it will be same results with getSpecialPrice(); that reason I m checking type.

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<?php
    //echo $_product->getTypeId();
    if($_product->getTypeId()!="simple"){
        $label_price=$_product->getSpecialPrice();
        $final_price=$_product->getFinalPrice();
        $save_percent = 100 - round(($final_price / $label_price)*100);
        echo $save_percent.'% Off';
    }else{

        $label_price=$_product->getPrice();
        $final_price=$_product->getSpecialPrice();
        $save_percent = 100 - round(($final_price / $label_price)*100);
        echo $save_percent.'% Off';

    }
    ?>
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