(a) Unless otherwise provided in the articles of incorporation, a majority of the shares entitled to vote, represented in person, by remote communication, or by proxy, constitutes a quorum at a meeting of shareholders, but in no event may a quorum consist of less than one-third of the shares entitled to vote at the meeting. If a quorum is present, the affirmative vote of the majority of shares represented at the meeting and entitled to vote on the subject matter is the act of the shareholders, unless the vote of a greater number or voting by classes is required by this chapter, the articles of incorporation, or the bylaws.
(b) Shareholders present at a meeting at which a quorum is present may continue to transact business until adjournment, notwithstanding the withdrawal of enough shareholders to leave less than a quorum, if any action taken other than adjournment is approved by at least a majority of shares required to constitute a quorum.