This paragraph marks the left and right edges of the display.

This paragraph has a left margin of 40 percent.

This paragraph has a left margin of 36 percent.

This div has a 20% left margin relative to the parent element (the body).

This p has a 20% left margin relative to the width of the parent element, div. Given that the parent element was already indented 20%, the total indent, relative to the page, should be 20% + 0.2 * (80%) = 36 percent

Table of width 100%.

If the table width is calculated relative to the full page, then the table will overflow the right margin of the display!