CREATE TABLE table_12545 ("Tournament" TEXT, "1973" TEXT, "1974" TEXT, "1975" TEXT, "1976" TEXT, "1977" TEXT, "1978" TEXT, "1979" TEXT, "1983" TEXT, "1984" TEXT, "1985" TEXT, "1986" TEXT)

What 1973 has a 1978 of 75%?
SELECT "1973" FROM table_12545 WHERE "1978" = '75%'
SELECT "1973" FROM "table_12545" WHERE "1978" = '75%'