A penny won’t buy you much these days but it will go a lot further than a Vietnamese dong. This has the dubious distinction of the worst rate of exchange against sterling of any currency – you need about 33,000 dong to buy just £1. Here are the world’s 10 least valuable currencies, as compiled by forexcurrency.us.
Next is the Indonesian rupiah, which has an exchange rate of about 15,300 against the pound………………………………………..Full Article: Source