A quorum is the number of members of a governing body who must be present for the body to conduct business; no binding decisions can be made unless a quorum is present. "Robert's Rules of Order," the definitive source on parliamentary procedure states that a majority of members must be present to have a quorum. For boards and committees, determining quorum is simply a matter of counting their members. For larger organizations, such as churches with fluid membership rolls and no formal governing body, a quorum is simply the members present at a given meeting, regardless of their number.
Determine the number members on the committee.
Divide the number of committee members into two groups, so one group has at least one more member than the other. The larger number is the number of members required for a quorum.
Count the members present at a meeting to determine whether the required number of members is present for a quorum.