Why in creating a Web page,you must follow the 60%content and 40%design/creativity.?

In creating a web page we must follow the correct content and correct creativity.
It is because to make the web page beautiful and perfect.In order to avoid crowded creativity.Sometimes more content is looks like unorganized.

And When you make design or creativity you must choose the nice or eye catching design, so that it looks perfect.

In making a Web page, sometimes many creativity than content.When you look at, it it become crowded.So when you make a Web page you must think what the exact content and exact creativity and design.

To make people like to see.