Emma is a professional cyclist.For the past year, she has been practicing to ride, as far as she can in a minute, At the beginning of the year, her personal record was 5/6 of a kilometer in one minute,After six months,she improved her record by 1/15 of a kilometer . After a year, she further improved her recordby 1/13 of a kilometer, What is the best record

(this is the 2nd time I ask this question)​