Since 1 Jamaican Dollar is equal to 0.00691586090317 United States Dollars, we could say that n Jamaican Dollars are equal to 0.00691586090317 times n United States Dollars. In other words, we could use the following formula:
United States Dollars = Jamaican Dollars x 0.00691586090317
For example, let's say that we want to convert 2 Jamaican Dollars to United States Dollars. Then, we just replace Jamaican Dollars in the abovementioned formula with 2:
United States Dollars = 2 x 0.00691586090317
That is, 2 Jamaican Dollars are equal to 0.0138317218063 United States Dollars.