Table:
|  | Year Ended December 31, |  |  |
| --- | --- | --- | --- |
|  | 2018 | 2017 | Change |
| Other Operating Data |  |  |  |
| Average Revenue Per Unit (ARPU) |  |  |  |
| ARPU—on-net | $ 480 | $ 506 | (5.1)% |
| ARPU—off-net | $ 1,155 | $ 1,239 | (6.8)% |
| Average price per megabit | $ 0.82 | $ 1.11 | (25.9)% |
| Customer Connections—end of period |  |  |  |
| On-net | 68,770 | 61,334 | 12.1% |
| Off-net | 10,974 | 9,953 | 10.3% |
Paragraphs:
Year Ended December 31, 2018 Compared to the Year Ended December 31, 2017
Our management reviews and analyzes several key financial measures in order to manage our business and assess the quality of and variability of our service revenue, operating results and cash flows. The following summary tables present a comparison of our results of operations with respect to certain key financial measures. The comparisons illustrated in the tables are discussed in greater detail below.
Question:
What is the percentage change in off-net APRU between 2017 and 2018?