The Big Mac Purchasing Power Parity (PPP) is a theory used by The Economist to show the value of a currency. It is based on the price of a McDonald’s Big Mac in different countries. The idea behind it is that, in theory, the same product should cost the same amount in every country. This way, you can compare how much money you would need to buy a Big Mac in one country with how much money you would need to buy one in another country.The PPP can be helpful for comparing currencies and figuring out which ones are worth more or less than others. It can also give an idea of how strong or weak a currency is compared to others. For example, according to the latest data from The Economist, $1 will get you 3.9 Brazilian reais but only 2 Canadian dollars . This means that Brazil’s currency is stronger than Canada’s – it takes more Canadian dollars to buy the same number of Brazilian reais as it does American dollars.