Answer :

answer: $50

We are told that ¥84.1 = $1, so to find the conversion from yen(¥) to US dollars($), we have to find how to get from ¥84.1 to $1. by dividing ¥84.1 by 84.1, we get 1, which means that we can covert yen to US dollars by diving by 84.1
¥84.1 / 84.1 = $1
Now, we have to find what ¥4,205 is in US dollars. We have already found that by dividing by 84.1 we can covert from ¥ to $, so let’s apply that to this by dividing our given amount in yen (¥4,205) by 84.1 to get our value in $.
¥4,205/ 84.1 = $50

there you go! hope this helps; let me know if you have questions