Country A had a nominal GDP of 15.7 billion one year ago while its CPI was 101%. Its current nominal GDP is 18.1 billion its current CPI is 107%. What is Country A's rate of change in real GDP? Express your answer as a percent followed by the % sign and rounded to the nearest tenth. The real interest rate is the aggregate rate of time preference is constrained by the productive opportunities of the economy all other answers characterize the real interest rate correctly could be limitless were it not for productive opportunity constraints