What was the cash flows provided by operating activities in 2019 as a percentage of the cash flow in 2018?
{"Cash flows provided by operating activities": {"2019": 378.3, "2018": 435.5, "2017": 351.1, "2019 v. 2018": -57.2, "2018 v. 2017": 84.4}, "Cash flows used in investing activities": {"2019": -551.0, "2018": -144.1, "2017": -84.7, "2019 v. 2018": -406.9, "2018 v. 2017": -59.4}, "Cash flows provided by (used in) financing activities": {"2019": 167.8, "2018": -287.3, "2017": -384.1, "2019 v. 2018": 455.1, "2018 v. 2017": 96.8}, "Net (decrease) increase in cash and cash equivalents": {"2019": -4.9, "2018": 4.1, "2017": -117.7, "2019 v. 2018": -9.0, "2018 v. 2017": 121.8}}
cash_flows_2019 = df["Cash flows provided by operating activities"]["2019"]
cash_flows_2018 = df["Cash flows provided by operating activities"]["2018"]
answer = cash_flows_2019 / cash_flows_2018 * 100.0