JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
	    <div id="left10"></div>
	    <div id="rest90"></div>
    </div>

CSS

div{height:400px}
	#container{width:100%}
	#left10{width:10%;float:left;background:red}
	#rest90{padding-left:1px;width:90%;float:left;background:yellow}