Originally Posted by theducks
Percent indent applies to the current, containing Block width, not the font
(percent, when applied to a Font-size, adjust the font relative to the called font. )
My perceived advantage is:
1) conserves space on a small screen.
2) increases the Visual aspects of the indent on wider screens.
My standard is 3-4% (about the same as 1.5-2em on a 5" screen), more on my CRT. It proportions itself to the screen width.