Exhibit 11 SCIENTIFIC-ATLANTA, INC. AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE (IN THOUSANDS, EXCEPT PER SHARE DATA) (UNAUDITED) Three Months Ended ---------------------------- September 26, September 27, 1997 1996 ------------- ------------- WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING 78,248 77,127 Add - Additional shares of common stock assumed issued upon exercise of options using the "treasury stock" method as it applies to the computation of primary earnings per share 1,678 543 ------- ------- NUMBER OF COMMON AND COMMON EQUIVALENT SHARES OUTSTANDING 79,926 77,670 Add - Additional shares of common stock assumed issued upon exercise of options using the "treasury stock" method as it applies to the computation of fully diluted earnings per share 89 167 ------- ------- NUMBER OF SHARES OUTSTANDING ASSUMING FULL DILUTION 80,015 77,837 ======= ======= NET EARNINGS FOR PRIMARY AND FULLY DILUTED COMPUTATION Continuing Operations $16,485 $10,811 Discontinued Operations -- 3,400 ------- ------- Net Earnings $16,485 $14,211 ======= ======= EARNINGS PER COMMON SHARE AND COMMON EQUIVALENT SHARE PRIMARY Continuing Operations $ 0.21 $ 0.14 Discontinued Operations -- 0.04 ------- ------- Net Earnings $ 0.21 $ 0.18 ======= ======= FULLY DILUTED Continuing Operations $ 0.21 $ 0.14 Discontinued Operations -- 0.04 ------- ------- Net Earnings $ 0.21 $ 0.18 ======= ======= 9 of 10