What was the percentage change in the net property and equipment?
{"Cost: -- Computers, peripheral and scientific equipment": {"2019": 1654000, "2018": 1350000}, "Cost: -- Software": {"2019": 2131000, "2018": 1749000}, "Cost: -- Leasehold improvements": {"2019": 310000, "2018": 294000}, "Cost: -- Office furniture and equipment": {"2019": 424000, "2018": 391000}, "Cost: -- ": {"2019": 4519000, "2018": 3784000}, "Cost: -- Less: Accumulated depreciation and amortization": {"2019": -2634000, "2018": -1797000}, "Cost: -- Property and equipment, net": {"2019": 1885000, "2018": 1987000}}
net_property_and_equipment_2019 = df["Cost: -- Property and equipment, net"]["2019"]
net_property_and_equipment_2018 = df["Cost: -- Property and equipment, net"]["2018"]
answer = (net_property_and_equipment_2019 - net_property_and_equipment_2018) / net_property_and_equipment_2018 * 100.0