2. Calculate the percentage change in the U.S. national debt since June 24, 2010.

Go to the United States Treasury Web site and find the latest information available on the size of the U.S. national debt.
Go to the U.S. Treasury’s Treasury Direct Web site at www.treasurydirect.gov . Click on “Debt to the Penny.” This will bring up the relevant tables. For example, on June 24, 2010, the size of the national debt was $13.04 trillion.