Example them “Twentyfifteen”
styles.css
/*
Theme Name: Twentyfifteen child
Description: Child theme of twentyfifteen
Author: Springer
Version: 1.0.00
Template: twentyfifteen
*/
functions.php
<?php
//Load Parent Styles
add_action('wp_enqueue_scripts',childtheme_init');
function childtheme_init(){
wp_enqueue_style('parent-style',get_template_directory_uri().'/style.css');
?>