Please answer the given financial question based on the context.
Context: entergy louisiana , llc and subsidiaries management 2019s financial discussion and analysis results of operations net income 2016 compared to 2015 net income increased $ 175.4 million primarily due to the effect of a settlement with the irs related to the 2010-2011 irs audit , which resulted in a $ 136.1 million reduction of income tax expense . also contributing to the increase were lower other operation and maintenance expenses , higher net revenue , and higher other income . the increase was partially offset by higher depreciation and amortization expenses , higher interest expense , and higher nuclear refueling outage expenses . 2015 compared to 2014 net income increased slightly , by $ 0.6 million , primarily due to higher net revenue and a lower effective income tax rate , offset by higher other operation and maintenance expenses , higher depreciation and amortization expenses , lower other income , and higher interest expense . net revenue 2016 compared to 2015 net revenue consists of operating revenues net of : 1 ) fuel , fuel-related expenses , and gas purchased for resale , 2 ) purchased power expenses , and 3 ) other regulatory charges . following is an analysis of the change in net revenue comparing 2016 to 2015 . amount ( in millions ) .
||amount ( in millions )|
|2015 net revenue|$ 2408.8|
|retail electric price|69.0|
|transmission equalization|-6.5 ( 6.5 )|
|volume/weather|-6.7 ( 6.7 )|
|louisiana act 55 financing savings obligation|-17.2 ( 17.2 )|
|other|-9.0 ( 9.0 )|
|2016 net revenue|$ 2438.4|
the retail electric price variance is primarily due to an increase in formula rate plan revenues , implemented with the first billing cycle of march 2016 , to collect the estimated first-year revenue requirement related to the purchase of power blocks 3 and 4 of the union power station . see note 2 to the financial statements for further discussion . the transmission equalization variance is primarily due to changes in transmission investments , including entergy louisiana 2019s exit from the system agreement in august 2016 . the volume/weather variance is primarily due to the effect of less favorable weather on residential sales , partially offset by an increase in industrial usage and an increase in volume during the unbilled period . the increase .
Question: what portion of the change in net income during 2016 was related the irs audit?


Answer: The answer is:0.77594