Hi, everyone! I am so happy to find this friendly and supportive forum , glad to be part of it. I just started taking classes in college this fall, and math is one of the subject I have to work hard. I am doing OK so far but there are problems I am finding hard to solve. One of them is a word problem using the percentage. I had spent almost all day today, trying to solve it and finally I am giving up and asking for help. I will appreciate the help. A hospital needs to dilute a 60% boric acid solution to a 10% solution. If it needs 40 liters of the 10% solution, how much of the 60% solution and how much water should it use?