What was the percentage change in net accounts receivables between 2018 and 2019?
{"Accounts receivable, gross": {"2019": 78269, "2018": 79902}, "Less: Allowance for doubtful accounts": {"2019": -261, "2018": -384}, "Accounts receivable, net": {"2019": 78008, "2018": 79518}}
accounts_receivable_net_2019 = df["Accounts receivable, net"]["2019"]
accounts_receivable_net_2018 = df["Accounts receivable, net"]["2018"]
answer = (accounts_receivable_net_2019 - accounts_receivable_net_2018) / accounts_receivable_net_2018 * 100.0