If I remember my numbers correctly the actual test in 100mg will be as follows.
Propionate 83mg
Enanthate 71mg
Cypionate 69mg
Decanoate 65mg
So as you can see, the ester makes up the rest of the weight on the 100mg. So if your running prop at 500mg/wk your actually getting 415mg of actual test once its unesterfied. On the other end we have decanoate and if you ran 500mg/wk of that, you would only be getting 325mg/wk of actual test