Final answer:
The maximum percentage of early promotes for each summary group is unclear due to potential missing context or a typo in the question. The data references the 2007 IUCN Red List and the percentages of species considered threatened, but it does not usually impose limits on promotion rates.
Step-by-step explanation:
The question seems to be referring to categories of threat to species as defined by the International Union for Conservation of Nature (IUCN). Specifically, it asks what the maximum percentage of earlier promotes (likely promotions or classifications) for each summary group (species groups) can be. Based on the information given, it sounds like the data provided is from the IUCN Red List from 2007 which categorizes species' risk of extinction. However, the question itself is not entirely clear as it seems to be missing some context or may contain a typo. As a result, without additional context, providing a definitive answer is challenging. IUCN categories do include percentages of species in different threat categories but do not usually limit 'promotes' to a maximum percentage. Clarification of the term 'early promotes' is needed to provide an accurate answer.