pre_text: 5. Earnings per Common Share The calculations of basic and diluted earnings per common share for the years ended June 30, 2019, 2018 and 2017 were as follows:
table: Years Ended June 30,
table: (in millions, except per share data) 2019 2018 2017
table: Net income $167.0 $188.5 $47.0
table: Less: earnings and dividends allocated to participating securities (1.9) (1.7) (0.3)
table: Earnings available for common shareholders used in calculation of basic earnings per share $165.1 $186.8 $46.7
table: Weighted average number of common shares outstanding, basic 47.7 47.2 47.0
table: Basic earnings per common share $3.46 $3.96 $0.99
table: Net income $167.0 $188.5 $47.0
table: Less: earnings and dividends allocated to participating securities (1.9) (1.7) (0.3)
table: Earnings available for common shareholders used in calculation of diluted earnings per share $165.1 $186.8 $46.7
table: Weighted average number of common shares outstanding, basic 47.7 47.2 47.0
table: Effect of shares issuable under share-based compensation plans 0.4 0.4 0.1
table: Weighted average number of common shares outstanding, diluted 48.1 47.6 47.1
table: Diluted earnings per common share $3.43 $3.92 $0.99
question: Analyse this data from a financial earnings document. What was the change in Weighted average number of common shares outstanding, basic in 2019 from 2018?