CREATE TABLE table_37895 ("Call sign" TEXT, "Frequency MHz" FLOAT, "City of license" TEXT, "ERP W" FLOAT, "Class" TEXT, "FCC info" TEXT)

Which Class has a Frequency MHz of 107.5?
SELECT "Class" FROM table_37895 WHERE "Frequency MHz" = '107.5'
SELECT "Class" FROM "table_37895" WHERE "Frequency MHz" = '107.5'