In my Biological Anthropology class, we did measurements of the human skull. Then for homework we plug the numbers in Excel to get some figures like, percent centrality of foramen magnum. I'm pretty sure I did the measurements right but what I keep getting is 32%. I was just wondering if this is with in the realm of possibility. I know that 50% is completely central and that favors bipedal locomotion. So I'm thinking my measurements must be incorrect but because I've never done this before I have no idea. Any advice or places to see typical foramen magnum indexes would be appreciated. Thanks!