Tutorial: How to create columns using the div tag

First, I created a container div that would hold everything in my layout. My CSS container rule was

#container
{
width: 800px;
text-align: left;
margin: 0 0 0 150px;

}

Next, within the HTML container div, I inserted a div for the content column and a div for the navigation column

Within the CSS rules, my content column was

#content
{    width: 65%;
float: left;
}

whereas my navigation column was

#navigation
{
width: 30%;
margin-left: 70%;

}

This makes my file look like this