Table:
|  | Number of Shares | Weighted- Average Grant Date Fair Value |
| --- | --- | --- |
| Unvested shares at December 31, 2018 | 4,117 | $41.94 |
| Granted | 1,589 | 55.69 |
| Forfeited | (510) | 45.72 |
| Vested | (1,440) | 40.61 |
| Unvested shares at December 31, 2019 | 3,756 | $47.76 |
Paragraphs:
Restricted Stock Units
RSU activity is summarized as follows (shares in thousands):
The weighted-average grant date fair value of RSUs granted during the years ended December 31, 2019, 2018, and 2017 was $55.69, $46.17, and $37.99, respectively. The total fair value of RSUs vested as of the vesting dates during the years ended December 31, 2019, 2018, and 2017 was $58.4 million, $49.9 million, and $37.2 million, respectively.
Unrecognized compensation expense related to unvested RSUs was $127.2 million at December 31, 2019, which is expected to be recognized over a weighted-average period of 2.6 years.
Question:
What is the change in number of unvested shares between 2018 and 2019?
Answer: (3756-4117) = -361