We know that one Canadian dollar is $1.12 in U.S. dollars. We can multiply 250*1.12 to get $250 USD in Canadian dollars. This gives us 280. The answer is $280 Canadian dollars is equivalent to $250 U.S. dollars.
If this was shown as a fraction, you would have 1.12/1. Next, we know that there are $250 U.S. dollars. 1*250 is 250. 1.12*250 is $280.