# Help with molar ratio

What is meant when asked write molar ratios in 3 parts? For example I am currently assembling a vector that requires annealing several oligos to two pcr fragments prior to ligating them into my vector; which will be used for future transformations. I was told to "assemble the annealed oligos with the 2 pcr fragments. Use a 100:1:1 molar ratio of annealed oligos:each pcr fragment." I'm thinking this means- concentrated oligos:diluted pcr frag #1:diluted pcr fragment #2. I am confused about how to determine the final concentrations of my pcr fragments in relation to the concentrated/undiluted annealed oligos. Why? Because I only know their concentrations as ng/uL not as 5x, 2x or 1x. Should I calculate it as 1(part) divided by 102 (whole) for each fragment? Then multiply that number by the actual concentration of my pcr fragments.

I am sure the answer to this is probably simple but I'm sorry I don't understand it and am hoping someone helps me with understanding calculations of this sort. Thanks.