Is that for men or women?

At any given weight, a healthy athletic female will have a body fat 5-8% higher (I mean as a % of total body weight - body fat itself could be 50-80% higher) than a healthy athletic male. As far as strength-to-weight ratios, competitive weight-lifting records are instructive that men have about the same strength as women 20% heavier.

I have trouble believing that a pat formula like that would hold for both sexes.