No, of course not, just a small trip down to memorylane and apply basic algebra. 

So now, for once and for all, below there are 2 approaches: 

1. You have a certain amount of wax (B) and want to have a certain amount of fragranceload (C)

D is calculated as follow: B/(100-C)*C 

A = D+B

2. You have a certain mass your candle need to be (A) and have a certain amount of fragranceload(C)

D is calculated as follow: A/100*C

B = A - D

Make it yourself easier?  Donwload the xlsx-file here:  https://nchem.eu/CANDLEWAX_CALCULATOR.xlsx