French phrase
Quel ~ appliquez-vous ?
Meaning
Which ___ do you apply?
When to use it
Asks which exchange rate is being used. Fairly formal, especially at exchange offices or hotel desks.
Example dialogue
Quel taux de change appliquez-vous ?
Which exchange rate do you apply?
Le taux du jour est de 1 € pour 1,08 $.
Today's rate is 1 euro to 1.08 dollars.