I need help with this question, I don't know how to do it.

Question

If 210 mL of isopropyl alcohol is diluted with water to a total volume of 300 mL, what is the percent by volume of isopropyl alcohol in the solution?

Answer 1

volume percent = [(volume solute/total volume solution)]*100 = ?
% v/v = (210/300)*100 = ?

Answer 2

I don't know, is 70% the answer??

Answer 3

Yes, but why don't don't you know? It's just substitute and solve for the answer.

Answer 4

I did I just wanted to make sure that it really was right. Thanks for the help.