Answer based on context:

Karnataka had an estimated GSDP (Gross State Domestic Product) of about US$115.86 billion in the 2014–15 fiscal year. The state registered a GSDP growth rate of 7% for the year 2014–2015. Karnatakas contribution to Indias GDP in the year 2014–15 was 7.54%. With GDP growth of 17.59% and per capita GDP growth of 16.04%, Karnataka is on the 6th position among all states and union territories. In an employment survey conducted for the year 2013–2014, the unemployment rate in Karnataka was 1.8% compared to the national rate of 4.9%. In 2011–2012, Karnataka had an estimated poverty ratio of 20.91% compared to the national ratio of 21.92%.

How many percent lower is the unemployment rate of Karnataka compared to the national rate in 2013-2014?
3.1