If you dilute 27.0\({\rm mL}\) of the stock solution to a final volume of 0.460\({\rm L}\) , what will be the concentration of the diluted solution?
I have written this before, perhaps to you, but this mish-mash use of symbols with no definitions is confusing. Also you didn't post the concentration of the stock solution AND you have no units for 0.460. If we call 0.460 L and the stock solution has a concentration of B, then
final concn = B x (27/460) = ?