#### SamuelMartin

##### New Member

ok, I always seen in all the exercises that when calculation the price of a Put to convert the d1 into -d1 you need to do --> -d1 = 1 - d1

However, I don't know in the following exercise solution, where the -d1 & -d2 figures are coming from.

Any help would be highly appreciated.

Thanks!!!!!

QUESTION IS IN THE PICTURE ATTACHED.

However, I don't know in the following exercise solution, where the -d1 & -d2 figures are coming from.

Any help would be highly appreciated.

Thanks!!!!!

QUESTION IS IN THE PICTURE ATTACHED.