obviously you can't hire this author to present even simple statistics because this information presented is completely useless.
Was he supposed prove that obama has spent more time on vacation that bush? If yes he failed miserably. Here's tip doofus
Total # of days in office =X
Total # of days on vacation = y
% time on vacation = y/x * 100
Jeez. I hope you don't balance your checkbook the same way!