Since 1 British Pound is equal to 99.5095905284 Indian Rupees, we could say that n British Pounds are equal to 99.5095905284 times n Indian Rupees. In other words, we could use the following formula:
Indian Rupees = British Pounds x 99.5095905284
For example, let's say that we want to convert 2 British Pounds to Indian Rupees. Then, we just replace British Pounds in the abovementioned formula with 2:
Indian Rupees = 2 x 99.5095905284
That is, 2 British Pounds are equal to 199.019181057 Indian Rupees.