I am learning different concepts presented in RONR and I want to be certain that I am interpreting pg. 403 correctly. If there are 50 members eligible to vote and 50 vote, 26 is a simple majority and 34 is a 2/3 majority. However, if only 40 of the eligible 50 members vote on a particular motion, is the simple majority 21 (27 for 2/3 majority) or should 26 be considered the threshold for a simple majority (27 for 2/3 majority) based on attendance?
Also, lines 21-24 are unclear to me. Why would the chair need to count those present immediately after an affirmative vote?