Which of these numbers is irrational?

Teenagers make up a large percentage of the market for clothing. below are data on running shoe ownership in four world regions (excluding china). at α = .01, does this sample show that running shoe ownership depends on world region? running shoe ownership in world regions owned by u.s. europe asia latin america row total teens 80 89 69 65 303 adults 20 11 31 35 97 col total 100 100 100 100 400