What is the most favorable currency exhcange rate for the us dollar?

It's my understanding that the us dollar is worth nine times the mexican peso. So if you were to exchange us dollars for pesos, it would increase the value. Is there another currency better suited for such a transaction?|||9 pesos would still be worth 1 U.S. dollar, though. At the time of this writing, one U.S. dollar is worth 106.55 Japanese Yen.|||actually depending on the economy the dollar can be worth 10 11 or 12 pesos and i think that pesos are the best