You seem to have assumed that it's 1:1 in terms of moles, among other things.
What mass of your original is NaCl? What mass is BaCl2.2H2O?
How many moles of BaCl2.2H2O do you have?
Oh yeah I see what your saying, see I was assuming that it meant 55% BaCl2*2H2O by weight rather than moles. So in that case first you have to get the moles, then the percentage, then go back to grams.
So then benworld, first you have to get moles of NaCl & BaCl2*2H2O, then take the moles, put them into percentage, then calculate the weight.
For example (Im making up numbers here for example sake) if NaCL only weighed 0.0001 g per mol and BaCl2*2H2O weighed 1.0 g per mole, and 55% of the substance was BaCl2*2H2O then you would have very different weights between NaCl and BaCl*2H2O
5 mol of BaCl would be 5g and 5 mol of NaCl would be 0.0005 g. Once again I made up the numbers just to show you.