disambiguate the concept of a majority vote

There are many places where '50% + 1' is mentioned. For an example
committee of 9 members, this intuitively means 5 members. However,
'50% + 1' of 9 is 5.5, which is either 5 or 6 depending on rounding
strategy, and is 6 members given the common 'round half up' method.