The Ratio of Scene to Narration

I recently had someone tell me this: "The balance between scene and narration is supposed to be 75% to 25%, actually."

As if novels can be written by numbers.

Notions such as this annoy me.

Being reductive is annoying. Image "Annoyed or Sleepy?" 
(CC BY-NC-ND 2.0) by Doug McGr.

I understand the need to try to figure out writing a novel when new to