What is the total revenue from Network Solutions as a percentage of total revenue from all segments?
{"Access & Aggregation": {"Network Solutions": 289980, "Services & Support": 58894, "Total": 348874}, "Subscriber Solutions & Experience (1)": {"Network Solutions": 144651, "Services & Support": 8269, "Total": 152920}, "Traditional & Other Products": {"Network Solutions": 20595, "Services & Support": 7672, "Total": 28267}, "Total": {"Network Solutions": 455226, "Services & Support": 74835, "Total": 530061}}
total_network_solutions = df["Total"]["Network Solutions"]
total_total = df["Total"]["Total"]
answer = total_network_solutions / total_total * 100.0