Why Do We Need Foreign Exchange?

Money and it's value fluctuates and investments are made in different countries by countries and individuals. To accurately account for the amounts paid and received in transactions and investments there needs to be a means of equalizing the different currencies of the different countries to ensure that both are getting paid and paying for a equalized amount. The means of equalizing the currencies is through the foreign exchange which calculates the relative value of different currencies to properly report and represent the differences in the values of different currencies.