Calculating Real Rate of Return

CFA Level III
#1

Would it be incorrect to calculate the real rate of return using the same equation to derive the real interest rate when given nominal and inflation rates?

real interest rate = [(1 + nominal rate) / (1 + inflation)] -1

real rate of return = [( 1 + nominal rate or return) / (1 + inflation)] - 1

#2

It would be correct. The calcuations are compatible.

#3

But does CFAI require that?

I’ve seen them just subtract inflation from nominal return in the context of ips requried returns.