Answer:
$ 1 = 0.56 pounds
Step-by-step explanation:
Converting the cost of a gallon of milk in the UK to US dollars is:
2*2 = 4 US Dollars
The percentage more expensive UK milk is than in the US
= (1 - (price of milk in US/price of milk in UK))*100
= (1- 3.5/4)*100 = 12.5%
So milk in the UK is 12.5% more expensive in the UK than in the US.
Therefore:
The real exchange rate = 0.5*the percentage of milk more expensive in UK + 0.5
1 Dollar = 0.56 Pounds