Align divs in a basic WordPress site

Slowed down the pace of edits and thought it through … working now! The padding-top compensates for a tendency of the button to sit too high.

.alignleft-luke5 {
width:70%;
height:200px;
float: left;
}
.alignright-luke5 {
width:30%;
height:200px;
float: left;
padding-top:0.8em;
}