Question: Percentage of babies born at 24 weeks that survive?
Answer: 40-70%
Disambiguated questions and answers: question: Percentage of babies born at 24 weeks that survive according to a 2012 study?
Percentage of babies born at 24 weeks that survive according to studies between 2003 and 2005?
answer: 40-70%
20 to 35 percent
Natural Questions answer: 50 to 70 percent (from the Wikipedia article "Fetal viability")