What is the percentage amount of the number of shares purchased in October?
{"October 1 to October 31": {"Total number of Shares purchased": 3646581, "Average price paid per share": 97.28, "Total number of shares purchased as part of publicly announced plans or programs": "\u2014", "Maximum number (or approximate dollar value) of shares that may yet be purchased under the plans or programs": "\u2014"}, "November 1 to November 30": {"Total number of Shares purchased": 1096773, "Average price paid per share": "\u2014 (ii)", "Total number of shares purchased as part of publicly announced plans or programs": "\u2014", "Maximum number (or approximate dollar value) of shares that may yet be purchased under the plans or programs": "\u2014"}, "December 1 to December 31": {"Total number of Shares purchased": "\u2014", "Average price paid per share": "\u2014", "Total number of shares purchased as part of publicly announced plans or programs": "\u2014", "Maximum number (or approximate dollar value) of shares that may yet be purchased under the plans or programs": "\u2014"}, "Total": {"Total number of Shares purchased": 4743354, "Average price paid per share": 97.28, "Total number of shares purchased as part of publicly announced plans or programs": "\u2014", "Maximum number (or approximate dollar value) of shares that may yet be purchased under the plans or programs": "\u2014"}}
october_shares = df["October 1 to October 31"]["Total number of Shares purchased"]
total_shares = df["Total"]["Total number of Shares purchased"]
answer = october_shares / total_shares * 100.0