<div id="main_layout">
   <div class="menu_layout">Menu</div>
   <div class="content_layout">Content</div>
</div>

#main_layout {
   width: 100%;
   height: 100%;
   display: block;
   background-color: yellow;
   position: relative;
}

body {
   padding: 0px;
   margin: 0px;
   outline: none;
}

div#main_layout div {
   float: left;
}

div#main_layout .menu_layout {
   background-color: red;
   width: 200px;
   height: 100%;
}

div#main_layout .content_layout {
   background-color: green;
   position: absolute;
   left: 200px;
   right: 0px;
   bottom: 0px;
   top: 0px;
}