What is the percentage change in the net cost of property and equipment from 2018 to 2019?
{"Computer equipment": {"2019": 137763, "2018": 94384}, "Furniture and fixtures": {"2019": 187167, "2018": 159648}, "Subtotal": {"2019": 324930, "2018": 254032}, "Less accumulated depreciation": {"2019": 148916, "2018": 104702}, "Property and equipment, net": {"2019": 176014, "2018": 149330}}
net_property_and_equipment_2019 = df["Property and equipment, net"]["2019"]
net_property_and_equipment_2018 = df["Property and equipment, net"]["2018"]
answer = (net_property_and_equipment_2019 - net_property_and_equipment_2018) / net_property_and_equipment_2018 * 100.0