17. Net Loss per Share

We compute net loss per share of common stock using the treasury stock method.

Basic net loss per share is computed by dividing net loss attributable to Ceridian available to common stockholders by the weighted-average number of shares of common stock outstanding during the period.

For the calculation of diluted net loss per share, net loss per share is adjusted by the effect of dilutive securities, including awards under our share-based compensation plans. Diluted net loss per share is computed by dividing the resulting net loss attributable to Ceridian available to common stockholders by the weighted-average number of fully diluted common shares outstanding. During the three and six months ended June 30, 2018 and 2017, our potential dilutive shares, such as stock options, RSUs, and shares of senior and junior convertible preferred stock were not included in the computation of diluted net loss per share as the effect of including these shares in the calculation would have been anti-dilutive.

The numerators and denominators of the basic and diluted net loss per share computations are calculated as follows:


	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Numerator:
Net loss attributable to Ceridian	$	(65.5	)	$	(22.9	)	$	(67.6	)	$	(34.1	)
Less: (Loss) income from discontinued operations		(9.7	)		0.2			(11.8	)		0.5

Net loss from continuing operations attributable to Ceridian		(55.8	)		(23.1	)		(55.8	)		(34.6	)
Less: Senior Preferred Stock dividends declared		2.4			5.3			7.7			10.0

Net loss from continuing operations attributable to Ceridian available to common stockholders	$	(58.2	)	$	(28.4	)	$	(63.5	)	$	(44.6	)

Denominator:
Weighted-average shares outstanding - basic		113,311,107			65,225,104			89,445,371			65,130,383
Weighted-average shares outstanding - diluted		113,311,107			65,225,104			89,445,371			65,130,383
Net loss per share from continuing operations attributable to Ceridian - basic and diluted	$	(0.51	)	$	(0.44	)	$	(0.71	)	$	(0.68	)
Net income per share from discontinued operations - basic and diluted	$	(0.09	)	$	0.01		$	(0.13	)	$	—

Net loss per share attributable to Ceridian - basic and diluted	$	(0.60	)	$	(0.43	)	$	(0.84	)	$	(0.68	)

The following potentially dilutive weighted-average shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive:


	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Senior convertible preferred stock		5,539,168		16,802,144		11,139,543		16,802,144
Junior convertible preferred stock		19,201,420		58,244,308		38,615,011		58,244,308
Stock options		15,000,923		11,536,649		13,503,505		11,130,826
Outstanding RSUs		519,691		605,990		550,395		413,435