UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Steps to reproduce the problem:
1. text-indent: 10%, is wrong
2. e.g : 
<style>
div{
    border: 1px solid #000;
    width: 600px;
    text-indent: 10%;

}
p{

}
</style>
<div id="div">
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
    <p id="p">bbbbbbbbbbbbbbbbbbbb</p>
</div>
3. if no p tag, text-indent is right. Or, it is wrong.

What is the expected behavior?

What went wrong?
The value % is wrong

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 67.0.3396.99  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: