Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.


entergy mississippi , inc . management's financial discussion and analysis results of operations net income 2008 compared to 2007 net income decreased $ 12.4 million primarily due to higher other operation and maintenance expenses , lower other income , and higher depreciation and amortization expenses , partially offset by higher net revenue . 2007 compared to 2006 net income increased $ 19.8 million primarily due to higher net revenue , lower other operation and maintenance expenses , higher other income , and lower interest expense , partially offset by higher depreciation and amortization expenses . net revenue 2008 compared to 2007 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 2008 to 2007 . amount ( in millions ) . <table class='wikitable'><tr><td>1</td><td>-</td><td>amount ( in millions )</td></tr><tr><td>2</td><td>2007 net revenue</td><td>$ 486.9</td></tr><tr><td>3</td><td>attala costs</td><td>9.9</td></tr><tr><td>4</td><td>rider revenue</td><td>6.0</td></tr><tr><td>5</td><td>base revenue</td><td>5.1</td></tr><tr><td>6</td><td>reserve equalization</td><td>-2.4 ( 2.4 )</td></tr><tr><td>7</td><td>net wholesale revenue</td><td>-4.0 ( 4.0 )</td></tr><tr><td>8</td><td>other</td><td>-2.7 ( 2.7 )</td></tr><tr><td>9</td><td>2008 net revenue</td><td>$ 498.8</td></tr></table> the attala costs variance is primarily due to an increase in the attala power plant costs that are recovered through the power management rider . the net income effect of this recovery in limited to a portion representing an allowed return on equity with the remainder offset by attala power plant costs in other operation and maintenance expenses , depreciation expenses , and taxes other than income taxes . the recovery of attala power plant costs is discussed further in "liquidity and capital resources - uses of capital" below . the rider revenue variance is the result of a storm damage rider that became effective in october 2007 . the establishment of this rider results in an increase in rider revenue and a corresponding increase in other operation and maintenance expense for the storm reserve with no effect on net income . the base revenue variance is primarily due to a formula rate plan increase effective july 2007 . the formula rate plan filing is discussed further in "state and local rate regulation" below . the reserve equalization variance is primarily due to changes in the entergy system generation mix compared to the same period in 2007. .
Question: what were net revenues in 2008?
Answer: 498.8
Question: what was net revenues in 2007?
Answer: 486.9
Question: what is the net difference?
Answer: 11.9
Question: what is 6 divided by the net difference?

0.5042