What is a unit rate that describes the exchange?

To find the unit rate of euros per dollar, we divide the amount of euros by the amount of dollars:

[

text{Unit Rate} = frac{text{Euros}}{text{Dollars}} = frac{450 text{ euros}}{600 text{ dollars}}.

]

Now, simplify this fraction:

[

frac{450}{600} = frac{450 div 150}{600 div 150} = frac{3}{4} = 0.75.
]

So, the unit rate is 0.75 euros per dollar.