What was the total percentage change in Total foreign currency losses between 2017 and 2019?
{"Foreign currency losses recorded in AOCL": {"2019": 45.8, "2018": 385.8, "2017": 51.6}, "Foreign currency (gains) losses recorded in Other expense": {"2019": -6.1, "2018": 4.5, "2017": -26.4}, "Total foreign currency losses": {"2019": 39.7, "2018": 390.3, "2017": 25.2}}
total_foreign_currency_losses_2019 = df["Total foreign currency losses"]["2019"]
total_foreign_currency_losses_2017 = df["Total foreign currency losses"]["2017"]
answer = (total_foreign_currency_losses_2019 - total_foreign_currency_losses_2017) / total_foreign_currency_losses_2017 * 100.0