GDP deflator measures the ratio of nominal GDP to real GDP, expressed as a percentage.
GDP Deflator=Real GDPNominal GDP×100
The base year is 2020, with a price of Rs 10 per kg.
Nominal GDP in 2021 (at current year prices):
=110×15
=Rs 1650
Real GDP in 2021 (at base year prices):
=110×10
=Rs 1100
GDP Deflator=11001650×100
=150%
The GDP deflator is 150 percent.