function you_save_echo_product() {
    global $product;

    // works for Simple and Variable type
    $regular_price  = get_post_meta( $product->get_id(), '_regular_price', true ); // 36.32
    $sale_price     = get_post_meta( $product->get_id(), '_sale_price', true ); // 24.99

    if( !empty($sale_price) ) {

        $saved_amount       = $regular_price - $sale_price;
        $currency_symbol    = get_woocommerce_currency_symbol();

        $percentage = round( ( ( $regular_price - $sale_price ) / $regular_price ) * 100 );
        ?>
            <p id="saving_total_price">You Save: <span class="symbol"><?php echo $currency_symbol; ?></span> <span class="amount"><?php echo $saved_amount; ?></span>.00</p>
        <?php
    }
}
//add_action( 'woocommerce_single_product_summary', 'you_save_echo_product', 11 );
add_filter('woocommerce_get_price_html', function($price,$product){
    ob_start();
    you_save_echo_product();
    $save = ob_get_clean();
    return $price.$save;
},10,2);