why in creating a web page we have to follow 60% in content and 40% of creativity and design?

In creating a web page we need to follow 60% in content because its one way of showing your personality and for them to be able to know that you have a great idea and it is one of the basis in how to grade our work. And we also need to follow 40% of creativity and design because it can attract people or the reader to view your web page.