What is the percentage of shares granted as a percentage of the number of outstanding shares at 2018?
{"Outstanding at September 2018": {"Number of Shares": 33800.0, "Weighted Average Exercise Price": 77.85}, "Granted": {"Number of Shares": 5450.0, "Weighted Average Exercise Price": 84.0}, "Exercised": {"Number of Shares": -2800.0, "Weighted Average Exercise Price": 79.22}, "Forfeited/Expired": {"Number of Shares": "\u2014", "Weighted Average Exercise Price": "\u2014"}, "Outstanding at September 2019": {"Number of Shares": 36450.0, "Weighted Average Exercise Price": 78.67}}
granted_shares = df["Granted"]["Number of Shares"]
outstanding_shares = df["Outstanding at September 2018"]["Number of Shares"]
answer = granted_shares / outstanding_shares * 100.0