What is a unit rate that describes the exchange?

A unit rate is a ratio that compares two different quantities, where one of the quantities is expressed as a single unit. For example, if a car travels 300 miles on 10 gallons of gas, the unit rate would be 30 miles per gallon (300 miles ÷ 10 gallons). This rate allows for easy comparison and understanding of efficiency or cost. In the context of exchange, it typically refers to the amount of one currency that can be exchanged for a single unit of another currency.