1 EXHIBIT 11 EL PASO NATURAL GAS COMPANY EARNINGS PER COMMON SHARE Form 10-Q (In Thousands, except earnings per share) Third Quarter Nine Months ----------------- ------------------- 1997 1996 1997 1996 ------- ------- -------- ------- Income available for common stock dividends $44,171 $24,807 $134,666 $13,984 Primary average common shares outstanding 58,907 36,319 58,285 35,667 Primary earnings per share $0.7498 $0.6830 $2.3105 $0.3921 Fully diluted average common shares outstanding 59,068 37,306 58,473 36,603 Fully diluted earnings per common share $0.7478 $0.6650 $2.3030 $0.3820