Last month I got a downgrade First Class to Business Class from Dusseldorf (Germany) to Dubai.
I booked and paid booking class A, long time ago! There was a high demand for Economy Class so they changed to a 2-class configuration. The flight was fully booked.

EU261 says 75% compensation of the price of the ticket. What does it mean?
On many forums I can read 75% of the returnticketprice, other people say 75% of that segment.

Emirates is calculating a very low price of that segment. I cannot check the price for that segment because I booked a return Dusseldorf - South East Asia.

Is there a court case available where I can find how to calculate the compensation?