What is the percentage change for the weighted-average ordinary basic shares outstanding between fiscal years ended June 30, 2018 and 2019?
{"Numerator: -- Net loss attributable to ordinary shareholders": {"2019": -637621.0, "2018": -113432.0, "2017": -37449.0}, "Denominator: -- Weighted-average ordinary shares outstandingbasic": {"2019": 238611.0, "2018": 231184.0, "2017": 222224.0}, "Denominator: -- Weighted-average ordinary shares outstandingdiluted": {"2019": 238611.0, "2018": 231184.0, "2017": 222224.0}, "Net loss per share attributable to ordinary shareholders: -- Basic net loss per share": {"2019": -2.67, "2018": -0.49, "2017": -0.17}, "Net loss per share attributable to ordinary shareholders: -- Diluted net loss per share": {"2019": -2.67, "2018": -0.49, "2017": -0.17}}
weighted_average_ordinary_shares_outstanding_basic_2019 = df["Denominator: -- Weighted-average ordinary shares outstandingbasic"]["2019"]
weighted_average_ordinary_shares_outstanding_basic_2018 = df["Denominator: -- Weighted-average ordinary shares outstandingbasic"]["2018"]
answer = (weighted_average_ordinary_shares_outstanding_basic_2019 - weighted_average_ordinary_shares_outstanding_basic_2018) / weighted_average_ordinary_shares_outstanding_basic_2018 * 100.0