<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>mspace percentages (reference)</title>
    <style>
      .red {
          background: red;
      }
    </style>
  </head>
  <body>
    <p>This test passes if there is a green square with no red.</p>
    <math display="block"
          style="width: 200px; height: 200px; background: green">
    </math>
  </body>
</html>
