What was the percentage change in the end of fiscal year balance between 2017 and 2018?
{"Beginning of fiscal year": {"2019": 8680, "2018": 7390, "2017": 7103}, "Additions from business combinations": {"2019": "\u2014", "2018": 1270, "2017": "\u2014"}, "Additions for tax positions of the current year": {"2019": 2027, "2018": 1078, "2017": 762}, "Additions for tax positions of prior years": {"2019": 519, "2018": "\u2014", "2017": "\u2014"}, "Reductions for tax positions of prior years": {"2019": -633, "2018": -1058, "2017": -64}, "Lapse in statute of limitations": {"2019": -9, "2018": "\u2014", "2017": -411}, "Settlements": {"2019": -2923, "2018": "\u2014", "2017": "\u2014"}, "End of fiscal year": {"2019": 7661, "2018": 8680, "2017": 7390}}
beginning_of_fiscal_year_2019 = df["Beginning of fiscal year"]["2019"]
beginning_of_fiscal_year_2018 = df["Beginning of fiscal year"]["2018"]
answer = ( beginning_of_fiscal_year_2019 - beginning_of_fiscal_year_2018 ) / beginning_of_fiscal_year_2018 * 100.0