Table:
|  |  | Years Ended |  |
| --- | --- | --- | --- |
|  |  | December 31, |  |
|  | 2019 | 2018 | 2017 |
|  |  | (In thousands, except share and per share data) |  |
| Numerator: |  |  |  |
| Net income (loss) attributable to common stockholders | $(16,490) | $19,813 | $17,929 |
| Denominator: |  |  |  |
| Weighted-average common shares, basic | 27,618,284 | 27,484,655 | 25,353,966 |
| Weighted-average common shares, diluted* | 27,618,284 | 28,416,512 | 26,269,727 |
| Net income (loss) per common share: |  |  |  |
| Basic: | $(0.60) | $0.72 | $0.71 |
| Diluted: | $(0.60) | $0.70 | $0.68 |
Paragraphs:
NET INCOME (LOSS) PER COMMON SHARE
Basic net income (loss) per common share is based upon the weighted-average number of common shares outstanding. Diluted net income (loss) per common share is based on the weighted-average number of common shares outstanding and potentially dilutive common shares outstanding and computed as follows:
* For the twelve months ended December 31, 2018, the diluted earnings per common share included the weighted average effect of 215,196 unvested Restricted Stock Units and 716,661 stock options that are potentially dilutive to earnings per share since the exercise price of such securities was less than the average market price during the period. For the twelve months ended December 31, 2017, the diluted earnings per common share included 438,712 unvested Restricted Stock Units and the weighted average effect of 477,048 stock options that are potentially dilutive to earnings per share since the exercise price of such securities was less than the average market price during the period.
Question:
What is the number of potentially dilutive stock options as a percentage of the total Weighted-average common shares, diluted in 2018?
Answer: 716661/28416512  = 2.52