Cost of living in Arequipa (Peru) is 63% cheaper than in Amsterdam (Netherlands)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 1,522 prices entered by 287 different people.
For example, to keep the same standard of living that would require €5,900 in Amsterdam you would need to make just about €2,161 (S/. 8,255) in Arequipa.