Suppose the exchange rate between U.S. dollars and Japanese yen is $1 US = 79.1 JPY, and

Question:

Suppose the exchange rate between U.S. dollars and Japanese yen is $1 US = ¥79.1 JPY, and the exchange rate between the U.S. dollar and the British pound is $1 US = £0.64 GBP. What is the cross rate of Japanese yen to British pounds? (In other words, how many yen are needed to purchase 1 pound?)

Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...