<div class="container">
  <div class="inner-container">
    <div class="progress-bar"></div>
  </div>
</div>

.container {
  background-color: lightblue;
  width: 200px;
}

.inner-container {
  width: 150px;
}

.progress-bar {
  width: 100%;
  height: 20px;
  background-color: blue;
}