What is the ratio of the total number of Executives recruited by organisation U in the years 2007 and 2009 together to the total number of Executives recruited by organisation P in the same years?

From above table , we have
Total number of Executives recruited by organisation U in the years 2007 and 2009 = 534 + 510 = 1044
Total number of Executives recruited by organisation P in the years 2007 and 2009 = 506 + 492 = 998
Required ratio = total number of Executives recruited by organisation U in the years 2007 and 2009 : the total number of Executives recruited by organisation P in the same years
Required ratio = 1044 : 998 = 522 : 499