# percentage

많은 CSS properties는 `%` 값을 가진다. (**가끔 parent object 기준으로 사이즈를 정의 하기 위해**). Many length properties 퍼센트를 사용한다.

* `width`
* `margin`
* `padding`
* `font-size` (where the size of the text is directly related to the size of its parent)

See the Pen [width, margin's %value is affected by parent width value](http://codepen.io/cooking/pen/woXJbx/) by cooking ([@cooking](http://codepen.io/cooking)) on [CodePen](http://codepen.io).
