If the exchange rate is 12.5 pesos per U.S. dollar, it is also 1/12.5 U.S. dollars per peso.

Exchange Rate

The amount one currency is valued when converted into another currency.

Pesos

The currency used in several countries, including Mexico and the Philippines, often symbolized by "$".

Dollar

A unit of currency used in various countries, most notably the United States, represented by the symbol $.