1 of every 13 Americans was in Boston on Memorial Day

http://www.boston.com/news/local/massachusetts/art...

The Greater Boston Convention & Visitors Bureau predicted a 2 percent increase in out-of-town visitors and hotel bookings in the Boston area, but the number was closer to 6 percent, with 1.3 million more people visiting the Boston area than last year.

1.3 million = 6%
1.3 million / 6 = 1% = 216,667
216,667 x 100 = 100% = 21,666,700

US population: 304,000,000
21,666,700 / 304,000,000 = 7.1%