What was the percentage change in the amount of leasehold improvements between 2018 and 2019?
{"Land": {"April 26, 2019": 106, "April 27, 2018": 106}, "Buildings and improvements": {"April 26, 2019": 605, "April 27, 2018": 594}, "Leasehold improvements": {"April 26, 2019": 86, "April 27, 2018": 88}, "Computer, production, engineering and other equipment": {"April 26, 2019": 817, "April 27, 2018": 733}, "Computer software": {"April 26, 2019": 357, "April 27, 2018": 357}, "Furniture and fixtures": {"April 26, 2019": 105, "April 27, 2018": 99}, "Construction-in-progress": {"April 26, 2019": 10, "April 27, 2018": 27}, "": {"April 26, 2019": 2086, "April 27, 2018": 2004}, "Accumulated depreciation and amortization": {"April 26, 2019": -1327, "April 27, 2018": -1248}, "Property and equipment, net": {"April 26, 2019": 759, "April 27, 2018": 756}}
leasehold_improvements_2019 = df["Leasehold improvements"]["April 26, 2019"]
leasehold_improvements_2018 = df["Leasehold improvements"]["April 27, 2018"]
answer = (leasehold_improvements_2019 - leasehold_improvements_2018) / leasehold_improvements_2018 * 100.0