1 Its a valuation agreed between them, but it would be astonishing if there was no relation to share price.
Just to confuse things there are 2 or more classes of share, not sure if all classes are quoted/listed. He will own different % of two classes of share
2 I think Ratcliffe started bidding for 100% but all bidders then notified that their bids didn't match Glazers valuation but suggested re-bid for a minority stake - which he did.
Ratcliffe has interests in a few sports businesses but ManU would be his largest (don't forget he bid for Chelsea against Boehly). Looks like he's trying to build up a portfolio of sports businesses with common 'strategic' managers - not dissimilar to US owners having stakes in NFL, basketball etc.
He's not commented on his goals or exit strategy, but surely realises its a 5+ year strategy to turn ManU round.
Maybe he thinks he's bought into an undervalued business - under valued because of bad management and lack of investment in facilities such as stadium so he thinks he'll be able to sell on at a profit come what may ?