What was the percentage change in the balance at the end of fiscal year for financing receivables between 2018 and 2019?
{"Year ended July 29, 2017 -- Balance at beginning of fiscal year .": {"Financing Receivables": 375, "Accounts Receivable": 249}, "Year ended July 29, 2017 -- Provisions (benefits)": {"Financing Receivables": -35, "Accounts Receivable": 27}, "Year ended July 29, 2017 -- Recoveries (write-offs), net .": {"Financing Receivables": -49, "Accounts Receivable": -61}, "Year ended July 29, 2017 -- Foreign exchange and other .": {"Financing Receivables": 4, "Accounts Receivable": -4}, "Year ended July 29, 2017 -- Balance at end of fiscal year": {"Financing Receivables": 295, "Accounts Receivable": 211}, "Year ended July 28, 2018 -- Balance at beginning of fiscal year .": {"Financing Receivables": 295, "Accounts Receivable": 211}, "Year ended July 28, 2018 -- Provisions (benefits)": {"Financing Receivables": -89, "Accounts Receivable": -45}, "Year ended July 28, 2018 -- Recoveries (write-offs), net .": {"Financing Receivables": -6, "Accounts Receivable": -37}, "Year ended July 28, 2018 -- Foreign exchange and other .": {"Financing Receivables": 5, "Accounts Receivable": "\u2014"}, "Year ended July 28, 2018 -- Balance at end of fiscal year": {"Financing Receivables": 205, "Accounts Receivable": 129}, "Year ended July 27, 2019 -- Balance at beginning of fiscal year": {"Financing Receivables": 205, "Accounts Receivable": 129}, "Year ended July 27, 2019 -- Provisions (benefits)": {"Financing Receivables": -16, "Accounts Receivable": 56}, "Year ended July 27, 2019 -- Recoveries (write-offs), net": {"Financing Receivables": -42, "Accounts Receivable": -50}, "Year ended July 27, 2019 -- Foreign exchange and other  .": {"Financing Receivables": -21, "Accounts Receivable": 1}, "Year ended July 27, 2019 -- Balance at end of fiscal year": {"Financing Receivables": 126, "Accounts Receivable": 136}}
balance_2019 = df["Year ended July 27, 2019 -- Balance at end of fiscal year"]["Financing Receivables"]
balance_2018 = df["Year ended July 28, 2018 -- Balance at end of fiscal year"]["Financing Receivables"]
answer = (balance_2019 - balance_2018) / balance_2018 * 100.0