2/18=.11111So 10 seats (10x18) would be 180 inches, which would now accommodate only 9 seats (9x20) assuming everything else stays the same. If applied to the entire stadium, that would be a 10% reduction in capacity approximately.
So about 11%
That's only the seated area. They'll still pack them into luxury boxes.
We have already see the largest ever husker game. If we want to see a crows close to 100k again we'll have to go out of state.