<div id="wrapper"> <div id="col1"> "fixed" </div> <div id="col2"> "fluid" </div> </div>
#wrapper{background:red;float:left;width:90%;height:200px;padding:5px} #col1{ float:left; width:100px; height:100%; background:green; } #col2{background:green;height:100%;margin-left:110px;margin-right:0px;}
http://jsfiddle.net/rhw0z1bj/