What percentage of the current us citizens can trace at least one of the members in their ancestry to ellis island

About 40 percent of all the current United States citizens can trace back at least one of their ancestors to Ellis Island.

Explanation:

Ellis Island is a small piece of land located in the middle of the Hudson River between New Jersey and New York. It served as an immigration station between 1892 and 1954.It was a door to most immigrants to pass through before arriving into the United States. The immigrants coming from northern and western Europe, Britain, Germany, Ireland, and most Scandinavian countries initially took refuge on the Ellis Island.