Please answer the given financial question based on the context.
Context: entergy louisiana , llc and subsidiaries management 2019s financial discussion and analysis plan to spin off the utility 2019s transmission business see the 201cplan to spin off the utility 2019s transmission business 201d section of entergy corporation and subsidiaries management 2019s financial discussion and analysis for a discussion of this matter , including the planned retirement of debt and preferred securities . results of operations net income 2011 compared to 2010 net income increased $ 242.5 million primarily due to a settlement with the irs related to the mark-to-market income tax treatment of power purchase contracts , which resulted in a $ 422 million income tax benefit . the net income effect was partially offset by a $ 199 million regulatory charge , which reduced net revenue , because a portion of the benefit will be shared with customers . see note 3 to the financial statements for additional discussion of the settlement and benefit sharing . 2010 compared to 2009 net income decreased slightly by $ 1.4 million primarily due to higher other operation and maintenance expenses , a higher effective income tax rate , and higher interest expense , almost entirely offset by higher net revenue . net revenue 2011 compared to 2010 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 ( credits ) . following is an analysis of the change in net revenue comparing 2011 to 2010 . amount ( in millions ) .
||amount ( in millions )|
|2010 net revenue|$ 1043.7|
|mark-to-market tax settlement sharing|-195.9 ( 195.9 )|
|retail electric price|32.5|
|volume/weather|11.6|
|other|-5.7 ( 5.7 )|
|2011 net revenue|$ 886.2|
the mark-to-market tax settlement sharing variance results from a regulatory charge because a portion of the benefits of a settlement with the irs related to the mark-to-market income tax treatment of power purchase contracts will be shared with customers , slightly offset by the amortization of a portion of that charge beginning in october 2011 . see notes 3 and 8 to the financial statements for additional discussion of the settlement and benefit sharing . the retail electric price variance is primarily due to a formula rate plan increase effective may 2011 . see note 2 to the financial statements for discussion of the formula rate plan increase. .
Question: what is change in percentage points in net income margin in 2011?


Answer: The answer is:0.27364