Since 1 Jamaican Dollar is equal to 0.006480964942574665 United States Dollars, we could say that n Jamaican Dollars are equal to 0.006480964942574665 times n United States Dollars. In other words, we could use the following formula:
United States Dollars = Jamaican Dollars x 0.006480964942574665
For example, let's say that we want to convert 2.0 Jamaican Dollars to United States Dollars. Then, we just replace Jamaican Dollars in the abovementioned formula with 2.0:
United States Dollars = 2.0 x 0.006480964942574665
That is, 2.0 Jamaican Dollars are equal to 0.01296192988514933 United States Dollars.