Since 1 Sri Lankan Rupee is equal to 0.0030949352572969473 United States Dollars, we could say that n Sri Lankan Rupees are equal to 0.0030949352572969473 times n United States Dollars. In other words, we could use the following formula:
United States Dollars = Sri Lankan Rupees x 0.0030949352572969473
For example, let's say that we want to convert 2.0 Sri Lankan Rupees to United States Dollars. Then, we just replace Sri Lankan Rupees in the abovementioned formula with 2.0:
United States Dollars = 2.0 x 0.0030949352572969473
That is, 2.0 Sri Lankan Rupees are equal to 0.0061898705145938945 United States Dollars.