In macroeconomics, how is the GDP deflator (a price index for all domestically produced final goods and services) calculated for a given year?

• A. GDP deflator $=\frac{\mathrm{Nominal}\mathrm{GDP}}{\mathrm{Real}\mathrm{GDP}}\times 100$
• B. GDP deflator $=\frac{\mathrm{CPI}-100}{100}$
• C. GDP deflator $=\frac{\mathrm{Real}\mathrm{GDP}}{\mathrm{Nominal}\mathrm{GDP}}\times 100$
• D. GDP deflator $=\frac{\mathrm{Nominal}\mathrm{GDP}-\mathrm{Real}\mathrm{GDP}}{\mathrm{Real}\mathrm{GDP}}\times 100$

Answer: (A)