The amount of dollars that Mr. Levant would exchange for 100 pesos on his return is $9.
An exchange rate is a rate that is used to convert one nation's currency to another.
The exchange rate is based on the purchasing power of each nation's currency.
Dollars before traveling to Mexico = $270
Value of Mexican pesos received for $270 = 3,000 pesos
Exchange rate = $1 = 11.11 pesos (3,000/$270)
Amount of pesos left after the trip = 100 pesos
Value of 100 pesos in dollars = $9 (100/$11.11)
Thus, the amount of dollars that Mr. Levant would exchange for 100 pesos on his return is $9.
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