Which group made up 20 percent of the delegates to the national women s conference in houston in 1977?

The correct answer is the "pro-life, pro-family" coalition

This was the coalition organized by Phyllis Schlafly who was notorious for her campaign against the Equal Rights Amendment and her support of family life and her fight against things like abortions. She did manage to win in the end since the Equal Rights Amendment never got ratified and was forgotten since it didn't get passed in the adequate amount of time.