In accordance with scrum theory, how should a group of 100 people be divided into multiple development teams?

The answer is: Teams of up to 6 people minimum.

Explanation:

Scrum is a very simple development methodology, which requires hard work, because management is not based on the follow-up of a plan, but on the continuous adaptation to the circumstances of the evolution of the project.

Each company can be distributed in departments of: human resources, development, commercial, quality, design ... according to the type of software systems that it develops or integrates, the size and distribution of the organization, etc.

Team size: One of the main bases of agile development is the preference of the communication and direct interaction of those involved in the project. Large projects involve numerous and sometimes physically distant teams, circumstances that make direct communication difficult. However, there are incipient developments of agile practices that implement grouping and direct communication schemes in cellular structures of teams of up to 6 people minimum.

The answer is: Teams of up to 6 people minimum.

Those who formed the group also known as the developers, should divide themselves into teams. Their teams should have no more than 10% of the total group on each team. In this case, 10% of 100 is 10, so each team should have no more than 10 people on each team.