Div 100% width and a margin

Question

I\'m trying to put a left and right margin on something that is also 100% width. I was using the box-sizing method which I was hoping would make it say 100% including the ma

Answer 1

You don't have to give width when you are using margin-left and margin-right.

Try This:

#main
{
 margin-left: 10%;
 margin-right: 10%;
 background: red;
}