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Weighted Average Shares Outstanding
 9 Months Ended
Sep. 30, 2022
Earnings Per Share [Abstract]  
Weighted Average Shares Outstanding Weighted Average Shares Outstanding
Basic earnings per share were calculated using net earnings and the weighted average number of shares of common stock outstanding during the respective period. Diluted earnings per share were calculated using net earnings and the weighted average number of shares of common stock and potential common stock outstanding during the respective period. Potentially dilutive common stock consisted of stock options based upon the trading price of Roper’s common stock. The effects of potential common stock were determined using the treasury stock method. Weighted average shares outstanding are shown below:

Three months ended September 30,Nine months ended September 30,
2022202120222021
Basic shares outstanding106.0 105.4 105.9 105.2 
Effect of potential common stock:
Common stock awards0.8 1.3 0.9 1.2 
Diluted shares outstanding106.8 106.7 106.8 106.4 

For the three and nine months ended September 30, 2022, there were 0.832 and 0.829 outstanding stock options, respectively, that were not included in the determination of diluted earnings per share because doing so would have been antidilutive, as compared to 0.502 and 0.530 outstanding stock options that would have been antidilutive in the respective 2021 periods.