Since 1 British Pound is equal to 254.619796149 Guyanaese Dollars, we could say that n British Pounds are equal to 254.619796149 times n Guyanaese Dollars. In other words, we could use the following formula:
Guyanaese Dollars = British Pounds x 254.619796149
For example, let's say that we want to convert 2 British Pounds to Guyanaese Dollars. Then, we just replace British Pounds in the abovementioned formula with 2:
Guyanaese Dollars = 2 x 254.619796149
That is, 2 British Pounds are equal to 509.239592298 Guyanaese Dollars.