### Question
How is the "pro rata share" defined?


### Answer
The term **pro rata share** is defined in *50 U.S.C. § 2154* as follows -

> the percentage that is equal to (A) the number of days of the marriage of the qualified former spouse to the employee during the employee's periods of creditable service under chapter 84 of title 5, divided by (B) the total number of days of the employee's creditable service

#### Citation:
  - *50 U.S.C. § 2154*
  - Heading: **CHAPTER 38-CENTRAL INTELLIGENCE AGENCY RETIREMENT AND DISABILITY > SUBCHAPTER III-PARTICIPATION IN FEDERAL EMPLOYEES&#8217; RETIREMENT SYSTEM**

