I must reply to another student's post. Just want to know how can I respond to this question? Did he explain it right or if anything could be added?

Below is the question and the student's response

Question- Please explain the advantage of common size financial statement analysis.

Response - The benefit in using common size analysis, it allows investors to identify the changes in a company's financial statement. For example, if a company is making money, it would also help to identify the reasonable cost per share.