If you mean miles per day travelled,
William has travelled about 8 days (2 x 4). Jason has travelled about 20 days (5 x 4).
William -> 400/8 ~ 40 miles/day
Jason -> 500/20 ~ 25 miles/day
so William has travelled more miles per day travelled
Jason because he travels more often and he travels very WEEKDAY not weekend. 7 days(which is a fulll week) are the weekdays he travel
William travels approximately 50 miles per day, while Jason travels about 25 miles per day. Therefore, William travels more miles per day than Jason this month. William's travel is higher due to fewer travel days but more miles overall per day traveled.
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