JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css">
<div class="row">
  <div class="col-md-4 col-xs-12">
    <figure class="overlay">
      <img src="https://preview.ibb.co/iFKqGk/base.jpg" alt="cat" class="img-fluid">
      <figcaption>Até<br>
        50%<br>
      </figcaption>
    </figure>
  </div>
  <div class="col-md-4 col-xs-12">
    <figure class="overlay">
      <img src="https://preview.ibb.co/iFKqGk/base.jpg" alt="cat" class="img-fluid">
      <figcaption>Até<br>
        30%<br>
      </figcaption>
    </figure>
  </div>
  <div class="col-md-4 col-xs-12">
    <figure class="overlay">
      <img src="https://preview.ibb.co/iFKqGk/base.jpg" alt="cat" class="img-fluid">
      <figcaption>Até<br>
        15%<br>
      </figcaption>
    </figure>
  </div>
</div>

CSS

figure.overlay {
    position: relative;
    width: 100%;
    z-index: 1;
  }
  figure.overlay img {width: 100% }

  figure.overlay figcaption {
    position: absolute;
    z-index: 1000;
    height: 100%;
    width: 100%;
    top: 0;
    /**optional background overlay**/
    background: rgba(255,255,255,0.2);
    /**text, adjust all values as desired**/
    padding: 44% 2% 0 15%;
    font-weight: 700;
    color: purple;
    /**some fallback value**/
    font-size: 16px;
    /**responsive size is roughly 3.4%  of the device's viewport width**/
    font-size: 2.0vw;
  }