At a nephew's party, you decide to write down everyone's birthday. Here are the results: Julia Dec. 18, Max Aug. 26, Melinda Oct 1, Zack Jan 17, Drew Apr 18, Margaret June 16, Isabel Sept 1, Colin Dec 31, Alexandra Mar 14, Philip Dec 9, Victoria July 10, Douglass Oct 31, What percentage of children have their birthdays in December? In February? What percentage have their birthdays in the same month as another child at the party?