Can someone figure this out in an algebraic expression?

Question

If 100 grams of dextrose is ordered using a 50% dextrose solution, how many mL are needed?

Answer 1

NOTE:  You are getting "down votes" on your questions, because you appear to be just posting homework problems without any attempt at solving them yourself.  You should attempt them, and then ask for assistance.

50% dextrose (m/v) = 50 g/100 ml

How many mls do you need to get 100 g?  That should be pretty easy.