What is the value of the audit-related fees as a percentage of the total fees paid to the auditor in 2018?
{"Audit fees (1)": {"2019 ($)": 1196000, "2018 ($)": 1257000}, "Audit-related fees (2)": {"2019 ($)": 0, "2018 ($)": 15000}, "Tax fees (3)": {"2019 ($)": 0, "2018 ($)": 0}, "All other fees (4)": {"2019 ($)": 2000, "2018 ($)": 2000}, "Total": {"2019 ($)": 1198000, "2018 ($)": 1274000}}
audit_related_fees_2018 = df["Audit-related fees (2)"]["2018 ($)"]
total_fees_2018 = df["Total"]["2018 ($)"]
answer = audit_related_fees_2018 / total_fees_2018 * 100.0