The direct answer first

Every article opens with the answer in one sentence, because a reader who only wants the answer should not have to read three paragraphs of preamble to find it.

Then the reasoning

The evidence follows, with the source named and the limits of the claim stated. Where a number is an estimate, the word estimate is in the sentence.

Then what it does not cover

A short closing note on what the article is not claiming. It is the least popular paragraph and the most useful one.