Since 1 British Pound is equal to 1.2239003255574865 US Dollars, we could say that n British Pounds are equal to 1.2239003255574865 times n US Dollars. In other words, we could use the following formula:
US Dollars = British Pounds x 1.2239003255574865
For example, let's say that we want to convert 2.0 British Pounds to US Dollars. Then, we just replace British Pounds in the abovementioned formula with 2.0:
US Dollars = 2.0 x 1.2239003255574865
That is, 2.0 British Pounds are equal to 2.447800651114973 US Dollars.