What is the percentage change in the finance leases and other financing obligations between fiscal years 2018 and 2019?
{"Senior secured term loan": {"December 27, 2019": 238129, "December 28, 2018": 239745, "December 29, 2017": 238435}, "Total Convertible debt": {"December 27, 2019": 154000, "December 28, 2018": "$\u2014", "December 29, 2017": 36750}, "Borrowings outstanding on asset-based loan facility": {"December 27, 2019": "$\u2014", "December 28, 2018": 44185, "December 29, 2017": "$\u2014"}, "Finance leases and other financing obligations": {"December 27, 2019": 3905, "December 28, 2018": 193, "December 29, 2017": 664}}
finance_leases_2019 = df["Finance leases and other financing obligations"]["December 27, 2019"]
finance_leases_2018 = df["Finance leases and other financing obligations"]["December 28, 2018"]
answer = ( finance_leases_2019 - finance_leases_2018 ) / finance_leases_2018 * 100.0