JSFiddle - React, Tailwind, and code Playground

HTML

<div class="half">
  <img src="http://placehold.it/350x150">
</div>
<div class="half">
  <img src="http://placehold.it/350x150">
</div>

CSS

.half {float:left; width:50%; text-align:center;}

@media screen and (max-width:800px) {
  .half {width:auto; float:none;}
}