JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
  <img class="big-img" src="https://webhostingvirtualdedicatedservers.com/files/2012/09/Web-server.png" />
  <img class="small-img" src="http://loosechange.co.za/wp-content/uploads/2012/06/Personal-Discount-10-lg.jpg" />
</div>

CSS

.wrapper{
  display: inline-block;
  position:relative;
}
.big-img{
  width: 100%;
  max-width: 100%;
  border: 1px solid blue;
}
.small-img{
  border: 1px solid red;
  position:absolute;
  right: 10%;
  top: 10%;
  width: 25%;
  max-width:25%;
}