Table: web_browser_usage_2
Columns: source
chrome
internet_explorer
firefox
safari
opera
other

Question: What percentage of users were using other browsers according to the source that reported 21.22% were using Firefox?
SQL: SELECT "other" FROM web_browser_usage_2 WHERE "firefox" = '21.22%'

Question: According to W3Counter, what percentage of browsers used Firefox?
SQL: SELECT "firefox" FROM web_browser_usage_2 WHERE "source" = 'w3counter'

Question: What percentage of users were using Firefox according to the source that reported 21.70% used Internet Explorer?
SQL: SELECT "firefox" FROM web_browser_usage_2 WHERE "internet_explorer" = '21.70%'

Question: Which source reported 32.60% of browsers used Chrome?
SQL: SELECT "source" FROM web_browser_usage_2 WHERE "chrome" = '32.60%'

Question: What percentage of users were using Firefox according to the source that reported 15.40% used Safari?
SQL: SELECT "firefox" FROM web_browser_usage_2 WHERE "safari" = '15.40%'

Question: What percentage of users were using Internet Explorer according to the source that reported 20.01% used Firefox?
SQL: SELECT "internet_explorer" FROM web_browser_usage_2 WHERE "firefox" = '20.01%'