A large mixture, including "Quakers" (who founded Pennsylvania), Catholics, Lutherans, and a few Jews.
There were multiple causes for the Greek War of Independence. Nationalism was spreading and the Greeks wanted their own independent government. The Ottomans were suppressing the Greeks because they were the minority so the Greeks wanted a change. They also wanted Christianity.
the decimal 0.4 is the same as 0.40 and is equivalent to the fraction 2/5. Which equals 40%. So if you subtract 4 from it it would be 0