.image-article {
  overflow: hidden;
}

.image-article.left img {
  float: left;
  margin: 0 1em 1em 0;
}

.image-article.right img {
  float: right;
  margin: 0 0 1em 1em;
}

.image-article.width-30 img { width: 30%; }
.image-article.width-40 img { width: 40%; }
.image-article.width-50 img { width: 50%; }