Question: how to calculate economic growth percentage?
Answer: Go to Table 1.1. 6, Real Gross Domestic Product, Chained Dollars, at the BEA website. ... 
Divide the annualized rate for Q4 2019 ($19.222 trillion) by the Q3 2019 annualized rate ($19.121 trillion). ... 
Raise this to the power of 4. ... 
Subtract one. ... 
Convert to a percentage by multiplying by 100.