What is the change in Weighted average common shares outstanding: Class A common stock – basic from Years Ended December 31, 2018 to 2019?
{"Net income": {"2019": 8675, "2018": 13489}, "Weighted average common shares outstanding: -- Class A common stock - basic": {"2019": 89251818, "2018": 88394580}, "Weighted average common shares outstanding: -- Class A common stock - diluted": {"2019": 89658938, "2018": 89045734}}
weighted_average_common_shares_outstanding_class_a_common_stock_basic_2019 = df["Weighted average common shares outstanding: -- Class A common stock - basic"]["2019"]
weighted_average_common_shares_outstanding_class_a_common_stock_basic_2018 = df["Weighted average common shares outstanding: -- Class A common stock - basic"]["2018"]
answer = weighted_average_common_shares_outstanding_class_a_common_stock_basic_2019 - weighted_average_common_shares_outstanding_class_a_common_stock_basic_2018