Math Quiz: NYT Learning Network

Through Math for America, I am part of an on-going collaboration with the New York Times Learning Network.  My latest contribution, a Test Yourself quiz-question, can be found here:

http://learning.blogs.nytimes.com/2011/04/18/test-yourself-math-april-18-2011/

This question is based on the recent budget agreement that avoided a government shutdown.  A total of $38 billion was cut from a multi-trilion dollar budget:  just how much did we reduce spending?