How do i enable a full width page?

I have a page that i removed the side bar on it but the width stayed the same. I want to make the width of the page 100%.
This is the page code:

<?php
/*
Template Name: blank_page
*/
?>
<?php get_header(); ?>
        
    <!-- BEGIN PAGE -->

    <div id="page">
    <div id="page-inner" class="clearfix">
        <div id="content">
            <?php if(have_posts()) : ?><?php while(have_posts())  : the_post(); ?>
                <div id="post-<?php the_ID(); ?>" class="post clearfix">
                                                    
                        <h1><a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></h1>

                    
                            <div class="entry" class="clearfix">
                                                                        
                                <?php the_content(); ?> 
                                                
                                <?php wp_reset_query(); ?>
                                <?php wp_link_pages(); ?> 
                                <!-- <?php trackback_rdf(); ?> -->
                            </div> <!-- end div .entry -->

                            <div class="divider"></div>

                            <ul class="postmeta">
                                <li>Posted by <?php the_author(); ?> - on <?php the_time('M d, Y') ?></li>
                                <li>Category: <?php the_category(', '); ?><?php if(function_exists("the_tags")) the_tags(' - Tags: ', ', ', ''); ?> </li>
                                <li><?php if ( comments_open() ) : ?><?php comments_popup_link('- No Comment', '- 1 Comment', '- % Comments'); ?><?php endif; ?> </li>
                                <li><?php edit_post_link('Edit', ' | ', ''); ?></li>
                            </ul>


                            <div class="divider no_border"></div>
                            
                            
                            <div class="comments">
                                <?php comments_template(); ?>
                            </div> <!-- end div .comments -->
                        
                        </div> <!-- end div .post -->

            <?php endwhile; ?>
            <?php else : ?>
                <div class="post">
                    <h2><?php _e('404 Error: Not Found', 'etedtheme'); ?></h2>
                </div>
            <?php endif; ?>
                                                          
        </div> <!-- end div #content -->
            
<?php get_footer(); ?>

Code (markup):

Any ideas?

 

you can follow this tutorial http://www.briangardner.com/create-landing-page/