CREATE TABLE table_21805 ("County" TEXT, "Kerry%" TEXT, "Kerry#" FLOAT, "Bush%" TEXT, "Bush#" FLOAT, "Others%" TEXT, "Others#" FLOAT, "2000 result" TEXT)

When the result was +2.5, what were the kerry%?
SELECT "Kerry%" FROM table_21805 WHERE "2000 result" = '+2.5'
SELECT "Kerry%" FROM "table_21805" WHERE "2000 result" = '+2.5'