Grade 10 conversion question okay i do online school and i've been stuck on this question for 2 weeks now. the teacher does it differently then i learned and i don't like talking to my teacher over skype so here i'll attach pictures of the question

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%