Answer:
The friend is wrong as the actual prices have increases over the past ten years
Step-by-step explanation:
Here we have
The cost of travelling in Mexico 10 years ago = X pesos
The cost of 10 pesos 10 years ago = $1.00
The cost of 15 pesos now = $1.00
Inflation in Mexico in 10 years = 100% in US = 25%
Therefore, before the inflation if
Price of one variety of American hot dog = $1.00 and
Price of one taco brand = 10 Pesos
After the inflation we have
25% Increase, price of the same hot dog = $1.25 while
100% increase, price for the taco = 20 pesos
However, 15 pesos is now $1.00, therefore;
20 pesos = $1.00 × 20/15 = $1.33
That is current selling price for taco is $1.33 which is more higher than previous $1.00
Where the cost of travelling in Mexico is directly related to the above example, then, travelling in Mexico is much expensive than it was ten years ago.