Anyone into counting beans or delegates remaining?

CNN was saying that if Obama picked up 60% of the remaining delegates he could not win before the National Democratic Convention.

In fact they said if he won 70% of the remaining delegates he still couldn't win outright.

Is their math fuzzy or does it make sense?

Does it work for Clinton if she wins Texas and Ohio by 70%?

And who wins Vermont?

Cheerily,
Charley Noble