JSFiddle - React, Tailwind, and code Playground

HTML

<div class="elem1" style="height: 50px; background-color: black;"></div>
<div class="elem2" style="height: 50px; background-color: black;"></div>

CSS

.elem1 {
  width: 47.5%;
  margin-right: 2.5%;
  display: inline-block;
}

.elem2 {
  width: 47.5%;
  margin-right: 2.5%;
  display: inline-block;
}