I can't give percentages or scores (SGS do not give them out for pupils who have passed).
The modest combined score in the two multiple choice papers is very modest indeed - that is, even if the candidate scored full marks in the maths and English essay (which have to be hand marked), they still couldn't achieve a pass mark overall.
I read that as "Even if everything was marked he still wouldn't have got in" (or the waiting list).
What I can say though is for my DS, maths is his strongest subject, comprehension is his worst ( he can't understand inferences to save his life!). I don't know whether he did very well or scraped through as they don't give scores out.
And if you have any questions (that can't be answered by this forum) ask AdmissionsLady - she has always answered all of mine.