Context: In the United States presidential election, 2008 of February 5, 2008, Sen. Clinton won 61.2% of the Bronxs 148,636 Democratic votes against 37.8% for Barack Obama and 1.0% for the other four candidates combined (John Edwards, Dennis Kucinich, Bill Richardson and Joe Biden). On the same day, John McCain won 54.4% of the boroughs 5,643 Republican votes, Mitt Romney 20.8%, Mike Huckabee 8.2%, Ron Paul 7.4%, Rudy Giuliani 5.6%, and the other candidates (Fred Thompson, Duncan Hunter and Alan Keyes) 3.6% between them.

Question: How many more percent votes did Romney get than Giuliani?

Answer:
15.2