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
	2018		2017		2016
Numerator:
Net income	$	3,027	$	1,778	$	1,772
Less: Net income (loss) attributable to noncontrolling interests	3		4		4
Net income attributable to Tyson	3,024		1,774		1,768
Less dividends declared:
Class A	378		285		192
Class B	80		61		41
Undistributed earnings	$	2,566	$	1,428	$	1,535

Class A undistributed earnings	$	2,115	$	1,177	$	1,279
Class B undistributed earnings	451		251		256
Total undistributed earnings	$	2,566	$	1,428	$	1,535

Denominator:
Denominator for basic earnings per share:
Class A weighted average shares	295		296		315
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		4		5
Denominator for diluted earnings per share – adjusted weighted average shares and assumed conversions	369		370		390

Net Income Per Share Attributable to Tyson:
Class A Basic	$	8.44	$	4.94	$	4.67
Class B Basic	$	7.59	$	4.45	$	4.24
Diluted	$	8.19	$	4.79	$	4.53
Dividends Declared Per Share:
Class A	$	1.275	$	0.975	$	0.650
Class B	$	1.148	$	0.878	$	0.585

Approximately 1 million of our stock-based compensation shares were antidilutive for both fiscal 2018 and 2017. We had no stock-based compensation shares that were antidilutive for fiscal 2016. 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.