Please answer the given financial question based on the context.
Context: purchases of equity securities 2013 during 2018 , we repurchased 57669746 shares of our common stock at an average price of $ 143.70 . the following table presents common stock repurchases during each month for the fourth quarter of 2018 : period total number of shares purchased [a] average price paid per share total number of shares purchased as part of a publicly announced plan or program [b] maximum number of shares remaining under the plan or program [b] .
|period|total number of shares purchased [a]|average price paid per share|total number of shares purchased as part of a publicly announcedplan or program [b]|maximum number of shares remaining under the plan or program [b]|
|oct . 1 through oct . 31|6091605|$ 158.20|6087727|32831024|
|nov . 1 through nov . 30|3408467|147.91|3402190|29428834|
|dec . 1 through dec . 31|3007951|148.40|3000715|26428119|
|total|12508023|$ 153.04|12490632|n/a|
[a] total number of shares purchased during the quarter includes approximately 17391 shares delivered or attested to upc by employees to pay stock option exercise prices , satisfy excess tax withholding obligations for stock option exercises or vesting of retention units , and pay withholding obligations for vesting of retention shares . [b] effective january 1 , 2017 , our board of directors authorized the repurchase of up to 120 million shares of our common stock by december 31 , 2020 . these repurchases may be made on the open market or through other transactions . our management has sole discretion with respect to determining the timing and amount of these transactions. .
Question: what percent of share repurchases took place in the fourth quarter?
Answer:
0.21689