Since 1 Sri Lankan Rupee is equal to 0.040478042041 Solomon Islands Dollars, we could say that n Sri Lankan Rupees are equal to 0.040478042041 times n Solomon Islands Dollars. In other words, we could use the following formula:
Solomon Islands Dollars = Sri Lankan Rupees x 0.040478042041
For example, let's say that we want to convert 2 Sri Lankan Rupees to Solomon Islands Dollars. Then, we just replace Sri Lankan Rupees in the abovementioned formula with 2:
Solomon Islands Dollars = 2 x 0.040478042041
That is, 2 Sri Lankan Rupees are equal to 0.080956084082 Solomon Islands Dollars.