Question

You can exchange $100.00 US currency to $175.00 Canadian currency. You spend $75 Canadian dollars and want to exchange the remaining $100.00 Canadian back to US dollars. How many US dollars (to the nearest dollar) will you receive?
A. $35 US
B. $57 US
C. $75 US
D. $87 US

Answer 1

Well lets see

If we exchange 100a for 175c

100a = 175c

Or

\[\large a = \frac{175}{100}c\]
\[\large a = 1.75c\]
also known as...1 american dollar is equal to 1.75 in Canadian dollars

So 100 canadian dollars divided by 1.75 to convert back to us currency would be approximately 57 american dollars