What was the difference in the percent variance between Software Solutions and Data and Analytics?
{"Software Solutions": {"2019": 412.7, "2018": 394.8, "$": 17.9, "%": 5.0}, "Data and Analytics": {"2019": 123.4, "2018": 115.0, "$": 8.4, "%": 7.0}, "Corporate and Other": {"2019": 109.9, "2018": 115.6, "$": -5.7, "%": -5.0}, "Total": {"2019": 646.0, "2018": 625.4, "$": 20.6, "%": 3.0}}
data_and_analytics_percent = df["Data and Analytics"]["%"]
software_solutions_percent = df["Software Solutions"]["%"]
answer = data_and_analytics_percent - software_solutions_percent