<!DOCTYPE html>
<html>
<head>
<style>
body {
    margin: 0px;
}

div {
    height: 100px;
}

.hidTarget {
    position: absolute;
    left: 100px;
    width: 100px;
    background-color: green;
}

.sized
{
    width: 200px;
}

.marginLeft
{
    margin-left: -webkit-calc(20% + 60px);
    background-color: red;
}

p
{
    position: absolute;
    top: 300px;
}
</style>
</head>
<body>
    <div class="hidTarget"></div>
    <div align="center" class="sized">
        <div class="marginLeft"></div>
    </div>
    <p>
        <a href="https://bugs.webkit.org/show_bug.cgi?id=89626">89626</a>: Non-fixed length margins don't work with align=center<br>
        There should be a green rectangle above with no red.
    </p>
</body>
</html>