Full market share issue

An entity, with a year-end of 31 December 20X8, issued 200,000 shares at full market price of $3 on 1 July 20X8. Relevant information 20X8 20X7 Profit attributable to the ordinary shareholders for the year ending 31 December $550,000 $460,000 Number of ordinary shares in issue at 31 December 1,000,000 800,000 Required: Calculate the EPS for each of the years. I got the correct answer here however I want to understand if doing 6/12 is even relevant here , doing it for shares ? and if it is correcting on basis of accounting why is it ? please explain