What is the percentage decrease in cash and cash equivalents from 2018 to 2019?
{"Cash and cash equivalents": {"Balance Sheet Line Item": "Cash and cash equivalents", "2019": 1352741, "2018": 1403562}, "Restricted cash  current (1)": {"Balance Sheet Line Item": "Prepaid expenses and other current assets", "2019": 13697, "2018": 19671}, "Restricted cash  noncurrent (1) .": {"Balance Sheet Line Item": "Restricted cash and investments", "2019": 80072, "2018": 139390}, "Total cash, cash equivalents, and restricted cash": {"Balance Sheet Line Item": "", "2019": 1446510, "2018": 1562623}}
cash_2018 = df["Cash and cash equivalents"]["2018"]
cash_2019 = df["Cash and cash equivalents"]["2019"]
answer = (cash_2018 - cash_2019) / cash_2018 * 100.0