CSS Ortalayamama Sorunum

<div class="merkez"><div class="row">  
                      <div class="load-skills triggerAnimation animated" data-animate="fadeInUp"> 
                          <article class="grid_12"> 
                               
  								<ul class="skills-circular big"> 
                                  <li class="chart easy-pie-chart" data-percent="100"> 
                                      <div class="percent-container"> 
                                          <span class="percent">23</span> 
                                      </div> 
   
                                      <span class="info">Gerçekleştirdiğimiz Proje Sayısı</span> 
                                  </li> 
   
   
                              </ul><!-- .skills-circualr end --> 
                          </article><!-- .grid_12 end --> 
                      </div><!-- .load-skills end --> 
                 </div> </div><!-- .row end -->

.grid_12 { 
      min-height: 1px; 
      margin-left: 15px; 
      margin-right: 15px; 
      float: center; 
      display: inline; 
  } 
  .merkez {  
  margin-left : auto; 
  margin-left : auto; 
  width: %70; 
  float : center;}