An amendment to the US Constitution must be ratified by what fraction of all the states?

More Questions:

What is the Cleveland Browns Stadium also known as?

What does a chrome-dome have a shortage of?

What are trammels and seines?

What was the first game to be released under the "Games for Windows" label?

What was named for Pope Sixtus IV when it was consecrated in a 1483 Mass?

What Canadian province is home to Pink Mountain, Muncho Lake and Nootka Sound?

Which is the second largest US state in surface area?

The Shenandoah Valley is located in which US state?

Where in the United States is coffee grown?

What Ivy League University is located in New Haven, Connecticut?

How would you write 99 in Roman numerals?

Who won an oscar for her role in "Gone with the Wind"?

What did Ronald Reagan disclose he was suffering from in 1994?

What Mexican revolutionary nearly started a war with the US when he invaded a town in New Mexico in 1916?

In 1983, the first Disney theme park built outside the US opened in what country?