Question

Mitchell travels from the US to Canada, where he exchanges 150 US dollars for Canadian dollars. He then spends 20 Canadian dollars, returns to the US, and exchanges the remaining money back to US dollars. How many US dollars does Mitchell have remaining?

Answer 1

as of right now 1.00 USD = 1.31 CD (lmk if you are provided a conversion factor, it may be different)

therefore: 150 USD = 1.31 * 150CD

subtract 20 from that to represent him spending 20 CD

then divide the remaining total by 1.31 to go back to USD