•Currencies in countries will rise as more people need it and as less people need it, it will fall. •Currency rates can rise and fall through the high rates. •If the countries economy is doing well, there will be more demand for the money there for raising the value.
Because if you produce goods in Japan then you use the yen as your currency (that is what you pay your taxes and workforce in). However you may sell your goods in the US and Europe. The people in the US will purchase them in dollars and in Europe in euros and you therefore need to convert these currencies into yen so that you can pay your local debts.
this is the comparison of what they need or want by exchanging or traing
Countries need to trade because they do not have all of the resources they need to survive. Countries also gain by trading what they have in surplus.
In order to convert currency, you need to include the two currencies as well as the date, because prices change every day.
Then, as now, different countries had different currencies. You need to say in which country.
•Currencies in countries will rise as more people need it and as less people need it, it will fall. •Currency rates can rise and fall through the high rates. •If the countries economy is doing well, there will be more demand for the money there for raising the value.
They do not. Many countries used to have non-decimal currencies. But conversion between small and large units was hard work. Working with decimals is much easier and that is why countries switched to decimal currencies.
Because if you produce goods in Japan then you use the yen as your currency (that is what you pay your taxes and workforce in). However you may sell your goods in the US and Europe. The people in the US will purchase them in dollars and in Europe in euros and you therefore need to convert these currencies into yen so that you can pay your local debts.
As today, there were different currencies in different countries. You need to say where you mean before this question can be answered
bartering
It seems there is a typo in your question. Did you mean "barter system"? The barter system is a method of exchanging goods and services without using money. Participants trade items of equivalent value directly with each other, relying on mutual agreement and need.
Nations need a system of currency exchange rate in order to be able to tell the value of their currencies. The exchange rate is set again the price of gold in order to have some uniformity across all nations.
this is the comparison of what they need or want by exchanging or traing
because it is important for the economy and the global position and exchanging.
Any problems in the countries using the SI system; in other countries people need to learn this rational system.
You need to be more specific. First, what country are we talking about? Many countries have (or had) currencies known as the Franc. Secondly, if this is a coin, you need to provide the year and an estimate of condition (for example, a 1843 French 1 Franc coin that is well-worn).