How to get marks?

I read an examiner’s report “On commenting on numerical work, there were numerous examples of scripts that limited themselves to basically putting into sentences the numbers calculated, e.g. ‘Amal has a higher profit margin than either Kayland or Cheapo.’ This is inadequate and gained no credit as a comment. This has been commented on in many previous reports and disappointingly, there has not been significant improvement over the diets in this aspect of candidates’ performance.”

I made a lot of answers like that, so I did not get marks. But how can I get marks if I want to say”Amal has a higher profit margin than either Kayland or Cheapo.”?