set anchor tag to match full width of parent list item

Issue

How can I make my anchor match the exact size of the parent list item? Currently it displays the size of the element itself.

Css:

ul li a{color: black;background:url(http://mwv3.webs.com/menu_hover.png)-20px bottom no-repeat;
padding:0px 0px 9px 0px;width:100%;
    -webkit-transition: background .5s ease;
     -moz-transition: background .5s ease;
       -o-transition: background .5s ease;
      -ms-transition: background .5s ease;
          transition: background .5s ease;
}

ul li a:hover{
 background:url(http://mwv3.webs.com/menu_hover.png) center bottom 
}

Html

<div id="wrapper">
 <div class="nav">
   <ul>
     <li><a href="#">One</a></li>
     <li><a href="#">One</a></li>
     <li><a href="#">One</a></li>
     <li><a href="#">One</a></li>
     <li><a href="#">One</a></li>
   </ul>
 </div>
</div>

Thanks

Solution

Just Use This css it will work fine on jsfiddle

ul li a{color: black;background:url(http://mwv3.webs.com/menu_hover.png)-20px bottom no-repeat;
    padding:0px 0px 9px 0px;width:100%;
        -webkit-transition: background .5s ease;
         -moz-transition: background .5s ease;
           -o-transition: background .5s ease;
          -ms-transition: background .5s ease;
              transition: background .5s ease;
    display:block;/*ADDED*/
}

ul li a:hover{

background:url(http://mwv3.webs.com/menu_hover.png) center bottom no-repeat; /*Changed*/
}

Answered By - Love Trivedi