What is the percentage of total borrowings in net debt in 2019?
{"Total borrowings": {"Group 2019": 4916.8, "Group 2018": 5331.0}, "Cash and cash equivalents": {"Group 2019": -223.0, "Group 2018": -274.3}, "Net debt": {"Group 2019": 4693.8, "Group 2018": 5056.7}, "Less Metrocentre compound financial instrument": {"Group 2019": -195.4, "Group 2018": -189.5}, "Net external debt": {"Group 2019": 4498.4, "Group 2018": 4867.2}, "Analysed as: -- Debt including Groups share of joint ventures": {"Group 2019": 4721.4, "Group 2018": 5141.5}, "Analysed as: -- Cash including Groups share of joint ventures": {"Group 2019": -223.0, "Group 2018": -274.3}, "Analysed as: -- Net external debt": {"Group 2019": 4498.4, "Group 2018": 4867.2}}
total_borrowings_2019 = df["Total borrowings"]["Group 2019"]
net_debt_2019 = df["Net debt"]["Group 2019"]
answer = total_borrowings_2019 / net_debt_2019 * 100.0