CREATE TABLE table_20141 ("Ecozone" TEXT, "Area  ( km\\u00b2 ) " FLOAT, "Percentage of total area" TEXT, "Percentage of land area" TEXT, "Percentage protected" TEXT)

What is the percentage of land area in the ecozone that the percentage protected is 15.28?
SELECT "Percentage of land area" FROM table_20141 WHERE "Percentage protected" = '15.28'
SELECT "Percentage of land area" FROM "table_20141" WHERE "Percentage protected" = '15.28'