Show Sale Percentage In WooCommerce

<?php 
$price = get_post_meta( get_the_ID(), '_price', true );
$regular_price = get_post_meta( get_the_ID(), '_regular_price', true );
$sale_price = get_post_meta( get_the_ID(), '_sale_price', true );

// "Saving Percentage" calculation and formatting
$precision = 1; // Max number of decimals
$saving_percentage = round( 100 - ( $sale_price / $regular_price * 100 ), 1 ) . '%';
?>