Table:
|  | Year Ended December 31, |  | % Change |
| --- | --- | --- | --- |
|  | 2019 | 2018 | 2019 |
|  |  | (dollars in thousands) |  |
| Interest and other income (expense), net | $(10,427) | $(13,755) | (24)% |
| % of net revenue | (3)% | (4)% |  |
Paragraphs:
Interest and Other Income (Expense)
Interest and other income (expense), net changed by $3.3 million from a net expense of $13.8 million in the year ended December 31, 2018 to a net expense of $10.4 million for the year ended December 31, 2019. The change in interest and other income (expense), net was primarily due to a decrease in interest expense pertaining to a lower average balance of debt outstanding under our term loan facility during the year.
Question:
What is the average % of net revenue for the year ended December 31, 2019 to 2018?
Answer: (3+4) / 2 = 3.5