No need to use a table
<html>
<head>
</head>
<style>
.left-col{
width:20%;
float:left;
background-color:#ff0000;
}
.right-col{
width:80%;
float:left;
background-color:#0000ff;
}
</style>
<body>
<div class="left-col">Left Col</div>
<div class="right-col">Right Col</div>
</body>
</html>