Answer:
The answer is 3.3%
Explanation:
Percentage growth rate is
New figure - Old figure /old figure x 100%
Real GDP in 2011 is $15.5 trillion
Real GDP in 2010 is $15 trillion
So we have $15.5 - $15/$15 x 100%
$0.5/$15 x 100%
0.033 x 100%
3.3% is the growth rate between 2011 and 2010.
Alternatively, new figure - old figure - 1
$15.5/15 - 1
1.033 - 1
0.033
Expressed as a percentage
0.033 x 100%
3.3%