A simple majority is 50% + 1. This is a specific, mathematical term with no debate. A supermajority is usually 66% (can be 60% or 75%, etc: more than a simple

A simple majority is 50% + 1. This is a specific, mathematical term with no debate. A supermajority is usually 66% (can be 60% or 75%, etc: more than a simple majority anyway). The exact value is context-dependent, but the concept is commonly defined, and the range is broadly represented. So I think, in my mind, a "vast" majority would be something like 90%, perhaps as low as 85%. But it's not a defined term. I don't think it needs to be 98% or 99% (I'd describe that as "basically everyone").