What percentage of the total dividend per share does the interim dividend per share constitute?
{"for the 53 weeks ended 30 June 2019": {"F19": 53, "F18": 52.0, "": "CHANGE", "CHANGE": "NORMALISED"}, "MARGINS  continuing operations -- Gross profit (%)": {"F19": 29.1, "F18": 29.3, "": -24.0, "CHANGE": -23.0}, "MARGINS  continuing operations -- Cost of doing business (%)": {"F19": 24.6, "F18": 24.9, "": -31.0, "CHANGE": -30.0}, "MARGINS  continuing operations -- EBIT (%)": {"F19": 4.5, "F18": 4.5, "": 7.0, "CHANGE": 7.0}, "EARNINGS PER SHARE AND DIVIDENDS -- Weighted average ordinary shares on issue (million)": {"F19": 1305.7, "F18": 1300.5, "": 0.4, "CHANGE": ""}, "EARNINGS PER SHARE AND DIVIDENDS -- Total Group basic EPS (cents) before significant items": {"F19": 142.8, "F18": 132.6, "": 7.7, "CHANGE": 5.8}, "EARNINGS PER SHARE AND DIVIDENDS -- Total Group basic EPS (cents) after significant items": {"F19": 206.2, "F18": 132.6, "": 55.5, "CHANGE": 53.7}, "EARNINGS PER SHARE AND DIVIDENDS -- Basic EPS (cents)  from continuing operations before significant items": {"F19": 134.2, "F18": 123.4, "": 8.8, "CHANGE": 6.8}, "EARNINGS PER SHARE AND DIVIDENDS -- Basic EPS (cents)  from continuing operations after significant items": {"F19": 114.3, "F18": 123.4, "": -7.4, "CHANGE": -9.3}, "EARNINGS PER SHARE AND DIVIDENDS -- Diluted EPS (cents)  from continuing operations before significant items": {"F19": 133.4, "F18": 123.1, "": 8.4, "CHANGE": 6.4}, "EARNINGS PER SHARE AND DIVIDENDS -- Diluted EPS (cents)  from continuing operations after significant items": {"F19": 113.6, "F18": 123.1, "": -7.7, "CHANGE": -9.7}, "EARNINGS PER SHARE AND DIVIDENDS -- Interim dividend per share (cents)": {"F19": 45, "F18": 43.0, "": 4.7, "CHANGE": ""}, "EARNINGS PER SHARE AND DIVIDENDS -- Final dividend per share (cents) 1": {"F19": 57, "F18": 50.0, "": 14.0, "CHANGE": ""}, "EARNINGS PER SHARE AND DIVIDENDS -- Special dividend per share (cents) 1": {"F19": "\u2013", "F18": 10.0, "": "n.m.", "CHANGE": ""}, "EARNINGS PER SHARE AND DIVIDENDS -- Total dividend per share (cents)": {"F19": 102, "F18": 103.0, "": -1.0, "CHANGE": ""}}
interim_dividend_per_share_2019 = df["EARNINGS PER SHARE AND DIVIDENDS -- Interim dividend per share (cents)"]["F19"]
total_dividend_per_share_2019 = df["EARNINGS PER SHARE AND DIVIDENDS -- Total dividend per share (cents)"]["F19"]
answer = interim_dividend_per_share_2019 / total_dividend_per_share_2019 * 100.0