Talk:Attack speed/@comment-118.209.124.170-20101018105526/@comment-3108512-20101101025624

That error comes from the percent listed for TF being imprecise. TF actually gains approximately(if not exactly) .021 aspd per level. Using the first formula, you get .651(1+.15)+(.021)(17)=1.10565, or about 1.106, which very nearly matches your estimate(if aspd rounds down then it matches). The actual corresponding percentage is about 3.226%(.021/.651).