Problem
Emily and Rob go on a family vacation in Canada; they fill up gas in the family car in the United States, paying 3.19 U.S. dollars per gallon. In Canada, they pay 1.59 Canadian dollars per liter. Suppose at the time, the exchange rate was 1.24 Canadian dollars per 1.00 U.S. dollars.
1) Find the equivalent of 1.59 Canadian dollars in U.S. dollars.
2) Find the equivalent of 1 liter in gallons.
3) Find the equivalent of 1.59 Canadian dollars per liter in U.S. dollars per gallon. Where was gas more expensive and by how much?
4) Answer the second question by finding the percentage of how much more (or less) expensive gas is in Canada compared to the United States.