Answer:
(i) Base year prices
(ii) between two consecutive years
Step-by-step explanation:
formula for GDP deflator is (real GDP)/(nominal GDP) x 100 which is the numerator real GDP where prices are valued at the current year adjusted to inflation or deflation and then the denominator where prices are valued at a base year where prices are valued at a nominal year which are not adjusted to any inflation or deflation.
The CPI ( consumer price index) is calculated by determining the rise or fall in price of a good or goods in two consecutive periods which in turn gives us the increase or decrease in price percentage.