What is the value of the net carrying amount of customer relationships as a percentage of the gross carrying amount?
{"December 29, 2019 -- ": {"Gross Carrying Amount": "Gross Carrying Amount", "Accumulated Amortization": "Accumulated Amortization", "Net Carrying Amount": "Net Carrying Amount"}, "December 29, 2019 -- Developed technology": {"Gross Carrying Amount": 959, "Accumulated Amortization": -96, "Net Carrying Amount": 863}, "December 29, 2019 -- Customer relationships": {"Gross Carrying Amount": 81, "Accumulated Amortization": -40, "Net Carrying Amount": 41}, "December 29, 2019 -- Trade names and trade marks": {"Gross Carrying Amount": 116, "Accumulated Amortization": -12, "Net Carrying Amount": 104}, "December 29, 2019 -- Total acquired identifiable intangible assets": {"Gross Carrying Amount": 1156, "Accumulated Amortization": -148, "Net Carrying Amount": 1008}}
net_carrying_amount = df["December 29, 2019 -- Customer relationships"]["Net Carrying Amount"]
gross_carrying_amount = df["December 29, 2019 -- Customer relationships"]["Gross Carrying Amount"]
answer = net_carrying_amount / gross_carrying_amount * 100.0