How much water did you start with?
How much water left?
How much water did you have left?
Answer these questions and you nearly are done.
A substance is 99% water. Some water evaporates, leaving a substance that is 98% water. How much of the water has evaporated?
I am having a very difficult time setting up an algebraic equation to solve this problem. I honestly do not know where to begin. None of the work I have done on this problem is worth posting. Perhaps I am over-thinking this one...