Table:
|  |  | VMware Stock Options |  | Pivotal Stock Options |
| --- | --- | --- | --- | --- |
|  | Number of Shares | Weighted-Average Exercise Price (per share) | Number of Shares | Weighted-Average Exercise Price (per share) |
| Outstanding, February 3, 2017 | 1,991 | $69.38 | 39,361 | $6.72 |
| Granted | 745 | 13.79 | 20,323 | 9.73 |
| Forfeited | (36) | 55.44 | (2,380) | 8.13 |
| Expired | (3) | 93.87 | (1,290) | 6.24 |
| Exercised | (1,050) | 53.50 | (1,626) | 5.99 |
| Outstanding, February 2, 2018 | 1,647 | 54.63 | 54,388 | 7.82 |
| Granted | 574 | 16.07 | 2,832 | 14.03 |
| Special Dividend adjustment | 348 | n/a | n/a | n/a |
| Forfeited | (31) | 24.44 | (2,028) | 9.35 |
| Expired | — | — | (273) | 7.02 |
| Exercised | (569) | 46.73 | (9,018) | 6.89 |
| Outstanding, February 1, 2019(1) | 1,969 | 36.50 | 45,901 | 8.31 |
| Granted(2) | 1,571 | 73.19 | — | — |
| Forfeited(3) | (149) | 52.83 | (10,822) | 10.65 |
| Expired | — | — | (128) | 10.10 |
| Exercised(4) | (776) | 39.94 | (34,951) | 7.59 |
| Outstanding, January 31, 2020 | 2,615 | 56.58 | — | — |
Paragraphs:
VMware and Pivotal Stock Options
The following table summarizes stock option activity for VMware and Pivotal since February 3, 2017 (shares in thousands):
(1) The weighted-average exercise price of options outstanding as of February 1, 2019 reflects the adjustments to the options as a result of the Special Dividend.
(2) Stock option granted under the VMware equity plan includes 0.6 million options issued for unvested options assumed as part of the Pivotal acquisition.
(3) Stock options forfeited under the Pivotal equity plan includes 6.2 million options converted to VMware options as part of the Pivotal acquisition, using a conversion ratio of 0.1.
(4) Stock options exercised under the Pivotal equity plan includes 22.4 million of vested options that were settled in cash as part of the Pivotal acquisition.
The above table includes stock options granted in conjunction with unvested stock options assumed in business combinations. As a result, the weighted-average exercise price per share may vary from the VMware stock price at time of grant
The stock options outstanding as of January 31, 2020 had an aggregate intrinsic value of $239 million based on VMware’s closing stock price as of January 31, 2020.
Question:
What was the change in outstanding number of shares for VMware Stock Options between 2017 and 2018?
Answer: 1647-1991 = -344