Complex sentence: Mayer was named to "Fortune" magazine's annual list of America's "50 Most Powerful Women in Business" in 2008,2009,2010,2011 and 2012 with ranks at 50,44,42,38 and 14 respectively.
Split into simpler sentences: Mayer was named to "Fortune" magazine's annual list of America's "50 Most Powerful Women in Business" in 2008,2009,2010,2011, and 2012. She was ranked 50,44,42,38 and 14 respectively.