Help with div - make div fit the remaining width

Answer 1

<div class="a">
	<div class="b">
		<a href="#">click here to be amazed!</a>
	</div>
	<div class="c">
		this is some awesome text
	</div>	
</div>

<STYLE>
	.b,.c {
		padding:15px;
	}

	div.a {		
		border: 1px solid red;
	}

	div.b {
		float: left;
		border: 1px solid blue;
	}

	div.c {
		border: 1px solid green;
	}
</STYLE>