Cost of living in Rennes (France) is 129% more expensive than in Alexandria (Egypt)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 244 prices entered by 27 different people.
For example, you would need at least E£ 34,386 (€1,677) in Rennes to maintain the same standard of living that you can have with E£ 15,000 in Alexandria.