Since 1 Sri Lankan Rupee is equal to 0.279606357549 Sudanese Pounds, we could say that n Sri Lankan Rupees are equal to 0.279606357549 times n Sudanese Pounds. In other words, we could use the following formula:
Sudanese Pounds = Sri Lankan Rupees x 0.279606357549
For example, let's say that we want to convert 2 Sri Lankan Rupees to Sudanese Pounds. Then, we just replace Sri Lankan Rupees in the abovementioned formula with 2:
Sudanese Pounds = 2 x 0.279606357549
That is, 2 Sri Lankan Rupees are equal to 0.559212715098 Sudanese Pounds.