<!doctype html>
<html>
<head>
<title>Priya</title>
</head>
<body>
<div style="background-color:orange">
<div>
<h1>studytonight</h1>
<p>best platform for web development</p>
</div>
<div>
<div style="width:25% ; float:left">Sidebar</div>
<div style="width:75%">Main</div>
</div>
</div>
</body>
</html>
what's error in this??