EARNINGS PER SHARE

The earnings and weighted average common shares used in the computation of basic and diluted earnings per share are as follows:



	in millions, except per share data
	2017		2016		2015
Numerator:
Net income	$	1,778	$	1,772	$	1,224
Less: Net income (loss) attributable to noncontrolling interests	4		4		4
Net income attributable to Tyson	1,774		1,768		1,220
Less dividends declared:
Class A	285		192		129
Class B	61		41		26
Undistributed earnings	$	1,428	$	1,535	$	1,065

Class A undistributed earnings	$	1,177	$	1,279	$	896
Class B undistributed earnings	251		256		169
Total undistributed earnings	$	1,428	$	1,535	$	1,065

Denominator:
Denominator for basic earnings per share:
Class A weighted average shares	296		315		335
Class B weighted average shares, and shares under if-converted method for diluted earnings per share	70		70		70
Effect of dilutive securities:
Stock options and restricted stock	4		5		5
Tangible Equity Units	—		—		3
Denominator for diluted earnings per share – adjusted weighted average shares and assumed conversions	370		390		413

Net Income Per Share Attributable to Tyson:
Class A Basic	$	4.94	$	4.67	$	3.06
Class B Basic	$	4.45	$	4.24	$	2.79
Diluted	$	4.79	$	4.53	$	2.95

Approximately 1 million of our stock-based compensation shares were antidilutive for fiscal 2017. We had no stock-based compensation shares that were antidilutive for fiscal 2016 and approximately 5 million of our stock-based compensation shares that were antidilutive for fiscal 2015. These shares were not included in the dilutive earnings per share calculation.

We have two classes of capital stock, Class A stock and Class B stock. Cash dividends cannot be paid to holders of Class B stock unless they are simultaneously paid to holders of Class A stock. The per share amount of cash dividends paid to holders of Class B stock cannot exceed 90% of the cash dividends paid to holders of Class A stock.

We allocate undistributed earnings based upon a 1 to 0.9 ratio per share to Class A stock and Class B stock, respectively. We allocate undistributed earnings based on this ratio due to historical dividend patterns, voting control of Class B shareholders and contractual limitations of dividends to Class B stock.