The American Dollar is the official currency of the United States. The symbol $, is usually written before its numerical value. The first American coins date from 1792, whereas the first notes were only produced in 1862 to cope with the scarcity of coins. Pne dollar coins and dollar bills exist simultaneously, although notes are found more easily. Several countries use the United States dollar as their official currency. In all, 37 million notes are produced per day, but around 95% of these notes are intended to replace others of equal value that have already deteriorated. Of this total of notes that are printed daily, 45% corresponds to the note of 1 dollar. These $1 bills have a life span of approximately one year, while the $100 bills last on average about nine years because they are much less used.
The British Sterling Pound is the official currency of the United Kingdom. The word pound was a term used by the monetary units of various regions of Europe and originates in Latin, which corresponded to a certain weight in silver. The word sterling derives from the word hard, strong, indestructible. It is one of the oldest coins in the world, having been declared official currency in the distant year of 928. Among the major international currencies, the pound sterling is the one with the highest value, surpassing even the euro and the dollar. Pound's notes and coins, although issued by several banks, are controlled by the Bank of England. It was only after 1971 that the decimal system was adopted, with the pound being divided into 100 pence.