Answer: -27.2%
Explanation:
The Real GDP can be calculated using the formula for calculating the Price Deflator which is the current price level for the year.
Price Deflator = (Nominal GDP / Real GDP) * 100
Real GDP = (Nominal GDP/ Price Deflator ) * 100
1929
= (103.6/11.9 )* 100
= $870.588
1933
= (56.4/8.9) * 100
= $633.70787
Percentage Change
= (870.588 - 633.70787) / 870.588
= 0.272
= -27.2%
GDP changed by -27.2% over the 4 year period between 1929 and 1933