I love how everyone on the Express is talking about Transfiguration 

I was writing a post about Meg working on calculations on the subject

(T) Transformation is directly influenced by (A)body weight, (V) viciousness, (W)wand power, (C) concentration and the unknown variable (Z*)
In other words; T= WxC over VxA x Z*

Megan see's it as simple applied mathmatics