Cost of living in Tehran (Iran) is 48% more expensive than in Zrenjanin (Serbia)
This comparison has some inconsistent or sparse data. It already provides a reliable comparison but it is not bullet-proof. It is based on 5,562 prices entered by 562 different people.
For example, you would need at least 113,600 Дин. (﷼ 45,614,424) in Tehran to maintain the same standard of living that you can have with 77,000 Дин. in Zrenjanin.