CREATE TABLE table_16446 ("1973 Democratic initial primary" TEXT, "Manhattan" TEXT, "The Bronx" TEXT, "Brooklyn" TEXT, "Queens" TEXT, "Richmond [Staten Is.]" TEXT, "Total" FLOAT, "%" TEXT)

What is the percentage for manhattan 45,901?
SELECT COUNT("%") FROM table_16446 WHERE "Manhattan" = '45,901'
SELECT COUNT("%") FROM "table_16446" WHERE "Manhattan" = '45,901'