css 使用百分比来设置元素的最大宽度

编辑代码

<!DOCTYPE html>
<html>
<head>
<style>
p
{
max-width:20%;
background-color:yellow;
}
</style>
</head>
<body>

<p>This is some text. This is some text. This is some text.
This is some text. This is some text. This is some text.
This is some text. This is some text. This is some text.</p>

</body>
</html>