What was the percentage change in Net income in 2018 from 2017?
{"Net income": {"September 28,2019": 53825, "September 29,2018": 247358, "September 30,2017": 207122}, "Other comprehensive income (loss):(1) -- Translation adjustment, net of taxes(2)": {"September 28,2019": -32609, "September 29,2018": -18065, "September 30,2017": 24923}, "Other comprehensive income (loss):(1) -- Changes in unrealized losses on available-for-sale securities, net of taxes(3)": {"September 28,2019": "\u2014", "September 29,2018": -4, "September 30,2017": -3330}, "Other comprehensive income (loss):(1) -- Defined benefit pension plans, net of taxes(4)": {"September 28,2019": -6560, "September 29,2018": 996, "September 30,2017": 3613}, "Other comprehensive income (loss):(1) -- Other comprehensive income (loss), net of tax": {"September 28,2019": -39169, "September 29,2018": -17073, "September 30,2017": 25206}, "Other comprehensive income (loss):(1) -- Comprehensive income": {"September 28,2019": 14656, "September 29,2018": 230285, "September 30,2017": 232328}}
net_income_2018 = df["Net income"]["September 29,2018"]
net_income_2017 = df["Net income"]["September 30,2017"]
answer = (net_income_2018 - net_income_2017) / net_income_2017 * 100.0