Center image inside div horizontally

Question

I am trying to set the image with arrow up/down to horizontally center of the div.

I have read some tutorials and questions here, but the following method does

Answer 1

just add .expander {left:50%;} to your css

/* Animation */
$(document).ready(function () {
  $('.text').hide();
  $('.expander').click(function () {
    $(this).parent().next().slideToggle(200);
  });
  $('.text').slideUp(200);
});

/* Change image */
$(function() {
  $('.expander').click(function(){
    $(this).children('img').each(function(){
      $(this).toggle(0);
    });
  });
});

.red { 
  background-color: #cc1042;
}
.expander {
left:50%;
}
.lefttext  p {
text-align:center;
}
.whitetext {
  color: #ffffff;
}
.lefttext{ 
  text-align: left; 
}
.centertext { 
  text-align: center;
}
.righttext {
  text-align: right;
}
.littpadding {	
  padding: 15px;
}
.paddingned80 {
  padding-bottom: 80px;
}
.close { 
  opacity: 1!important;
}
.close:focus, .close:hover {
  opacity: 1!important;
}
.clickexpander {
  position:absolute;
  bottom: 10px;
}
.clickexpander img {
  max-width: 50px;
}

  

    
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