Simplify the following text for a Grade 10 native English-speaking person.
Original: The Big Mac PPP exchange rate between two countries is obtained by dividing the price of a Big Mac in one country ( in its currency ) by the price of a Big Mac in another country ( in its currency ) .
Simplified: The exchange rate between two countries can be compared by dividing the price of a Big Mac in one country ( in its currency ) by the price of a Big Mac in another country ( in its currency ) .