-10em left *New

20em

Percent grid inside static Div *New
50%
50%
25%
25%
25%
25%
67,67%
33,33%
33,33%
33,33%
33,33%

-10em right *New

fluid

Percent grid inside Fluid Div! Even more flexibility! *New
20%
20%
50%
10%
50%
25%
25%
25%
25%
25%
25%
25%
25%
10%
10%
10%
10%
10%
10%
10%
10%
10%
10%
67,67%
33,33%
33,33%
33,33%
33,33%
35%
65%
I'm absolute DIV *New
(20em; left:20em; top:20em)