No math. Since we don't know the spoon size, we can assume it's equal to the quantity of a liquid in a glass (of coarse a glass should take this additioal amount).
Now put both into one glass, mix and take half back. Here we are - concentration is equal.
The Other Tesla David Blaza5 comments I find myself going to Kickstarter and Indiegogo on a regular basis these days because they have become real innovation marketplaces. As far as I'm concerned, this is where a lot of cool ...