Answer: c) Both economies grew at the same rate
Step-by-step explanation:
The faster growing economy would be the one that saw a greater increase in Real GDP than the other.
Real GDP growth = Nominal GDP growth - Inflation growth.
Hyperpolis Real GDP growth = 15% - 12%
Hyperpolis Real GDP growth = 3%
Superpolis Real GDP growth = 6% - 3%
Superpolis Real GDP growth = 3%
Both countries grew at the same rate of 3%.