What was the percentage change in the Dividend payments allocated to additional paid-in capital between 2017 and 2018?
{"Dividends per share declared": {"April 26, 2019": 1.6, "April 27, 2018": 0.8, "April 28, 2017": 0.76}, "Dividend payments allocated to additional paid-in capital": {"April 26, 2019": 403.0, "April 27, 2018": 106.0, "April 28, 2017": 88.0}, "Dividend payments allocated to retained earnings (accumulated deficit)": {"April 26, 2019": "$ \u2014", "April 27, 2018": 108.0, "April 28, 2017": 120.0}}
dividend_payments_2018 = df["Dividend payments allocated to additional paid-in capital"]["April 27, 2018"]
dividend_payments_2017 = df["Dividend payments allocated to additional paid-in capital"]["April 28, 2017"]
answer = ( dividend_payments_2018 - dividend_payments_2017 ) / dividend_payments_2017 * 100.0