osition" style="width: 200px; height: 100px;">
  <div style="position: absolute; top: 10%; left: 30%; width: 10px; height: 10px;"></div>
</div>

<div id="percentage_width_height_undefined_parent_size">
  <div style="width: 50%; height: 50%;"></div>
</div>

<div id="percent_within_flex_grow" style="flex-direction:row; width: 350px; height: 100px; align-items: stretch; ">
  <div style="width:100px;"></div>
  <div style="flex-grow: 1;">
      <div style="width:100%;"></div>
  </div>
  <div style="width: 100px;