Table:
|  |  | Year ended December 31, |  |
| --- | --- | --- | --- |
|  | 2019 | 2018 | 2017 |
| Primary geographical markets |  |  |  |
| North America | 93% | 95% | 96% |
| Others | 7% | 5% | 4% |
| Total revenues | 100% | 100% | 100% |
Paragraphs:
Disaggregation of revenue
The following table provides information about disaggregated revenue by primary geographical markets:
The Company derived over 90%, and approximately 88% and 84% of subscription revenues from RingCentral Office product for the years ended December 31, 2019, 2018 and 2017, respectively
Question:
What is the change in percentage of total revenue earned in North America between 2018 and 2019?
Answer: 93-95 = -2