Please answer the given financial question based on the context.
Context: table of contents the following table discloses purchases of shares of our common stock made by us or on our behalf during the fourth quarter of 2016 . period total number of shares purchased average price paid per share total number of shares not purchased as part of publicly announced plans or programs ( a ) total number of shares purchased as part of publicly announced plans or programs approximate dollar value of shares that may yet be purchased under the plans or programs ( b ) .
|period|total numberof sharespurchased|averageprice paidper share|total number ofshares notpurchased as part ofpublicly announcedplans or programs ( a )|total number ofshares purchased aspart of publiclyannounced plans orprograms|approximate dollarvalue of shares thatmay yet be purchasedunder the plans orprograms ( b )|
|october 2016|433272|$ 52.69|50337|382935|$ 2.7 billion|
|november 2016|667644|$ 62.25|248349|419295|$ 2.6 billion|
|december 2016|1559569|$ 66.09|688|1558881|$ 2.5 billion|
|total|2660485|$ 62.95|299374|2361111|$ 2.5 billion|
( a ) the shares reported in this column represent purchases settled in the fourth quarter of 2016 relating to ( i ) our purchases of shares in open-market transactions to meet our obligations under stock-based compensation plans , and ( ii ) our purchases of shares from our employees and non-employee directors in connection with the exercise of stock options , the vesting of restricted stock , and other stock compensation transactions in accordance with the terms of our stock-based compensation plans . ( b ) on july 13 , 2015 , we announced that our board of directors authorized our purchase of up to $ 2.5 billion of our outstanding common stock . this authorization has no expiration date . as of december 31 , 2016 , the approximate dollar value of shares that may yet be purchased under the 2015 authorization is $ 40 million . on september 21 , 2016 , we announced that our board of directors authorized our purchase of up to an additional $ 2.5 billion of our outstanding common stock with no expiration date . as of december 31 , 2016 , no purchases have been made under the 2016 authorization. .
Question: as of december 31 , 2016 what was the percent of the shares outstanding of the 2015 program yet to be purchased
Answer:
16.0