I am dont understand the logic behind going from real to nominal and from pre-tax to after tax. There is many possibilities in the exam can give us and we need to know how to move from A to B.
If you start with 9.3% Nominal Pre-Tax and want to go to Real After Tax
There is two ways to go about in the first step:
a. Do you take the (1-tx) to make after tax first
b. Do you substract the inflation first and then multiply by (1-tx)
I actually understand this one but in general is there a logic to undertand if you add or substract inflation first or if you start with the multiplication or divsion of (1-x).