Final answer:
To adjourn, typically a simple majority is sufficient in legislative bodies like the U.S. Congress. However, a quorum must be present to conduct business, and a supermajority may be required for specific actions.
Step-by-step explanation:
The process of adjourning in legislative bodies such as the United States Congress requires certain conditions to be met. While a majority is needed to conduct business, a quorum, which is a majority of the members, must be present to do so.
However, if there is less than a quorum, the members present may adjourn from day to day and may be authorized to compel the attendance of absent members.
In specific circumstances, different voting thresholds are required. For example, when a vote is split 50-50 or when there aren't enough votes to reach a required supermajority, the status quo prevails.
This means, in cases of setting a time to adjourn where both the House and Senate must agree, a simple majority would typically suffice, unless the decision is contested.