CREATE TABLE table_65883 ("Source" CLOB, "Chrome" CLOB, "Internet Explorer" CLOB, "Firefox" CLOB, "Safari" CLOB, "Opera" CLOB, "Other" CLOB)

What percentage of users were using Firefox according to the source that reported 21.70% used Internet Explorer?
SELECT "Firefox" FROM table_65883 WHERE "Internet Explorer" = '21.70%'
SELECT "Firefox" FROM "table_65883" WHERE "Internet Explorer" = '21.70%'