CREATE TABLE table_19162 ("School Name" TEXT, "City" TEXT, "Students" FLOAT, "FTE Teachers" TEXT, "Pupil/Teacher Ratio" TEXT, "School Level" TEXT, "Low Grade" TEXT, "High Grade" TEXT)

What is the highest number of students with a teacher:student ratio of 20.8?
SELECT MAX("Students") FROM table_19162 WHERE "Pupil/Teacher Ratio" = '20.8'
SELECT MAX("Students") FROM "table_19162" WHERE "Pupil/Teacher Ratio" = '20.8'