What percentage of the total cash, cash equivalents, and restricted cash is made up of prepaid expenses and other current assets in 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}}
restricted_cash_current_1_2019 = df["Restricted cash  current (1)"]["2019"]
total_cash_cash_equivalents_restricted_cash_2019 = df["Total cash, cash equivalents, and restricted cash"]["2019"]
answer = restricted_cash_current_1_2019 / total_cash_cash_equivalents_restricted_cash_2019 * 100.0