I see that data is correct, but let's zoom in. There are lots of private schools for the richer, and that might help lead to this fact regarding NYC public school students:

> 75.3 percent were economically disadvantaged [0]

75.3% = "if their family participates in specific economic assistance programs or meets distinct low-income thresholds."

[0] https://www.schools.nyc.gov/about-us/reports/nycps-data-at-a...