In 2007, the Peruvian economy experienced a growth rate of 9%, the highest in Latin America, and this repeated in 2008 with a 9.8% rate; in 2006 and 2007, the Lima Stock Exchange grew by 185.24%  and 168.3%, respectively. However, in the wake of the 2008 global crisis, growth for 2009 was only 0.9 percent,  but rebounded to 8.8 percent the following year.  The pro-market policies enacted by Fujimori, were continued by presidents Alejandro Toledo and Alan Garcia, While poverty of Lima is 8.5%, the national average is 25.8%, while the unemployment rate is 6.5% and 74% are employed formally.
Question: How many percentage points lower was the Lima poverty rate compared to the national average?
Answer: 17.3