document.write( "Question 230583: I am working on mixture problems right now , here is an example of one that I can solve... A chemist has 40 ml. of a solution that is 50% acid. How much water should he add to make a solution that is 10% acid? My text book shows the steps to solve the problem.\r
\n" ); document.write( "\n" ); document.write( " .50(40) + 0 = .10(40+ x)
\n" ); document.write( " 2000 = 400+ 10x
\n" ); document.write( " 1600 = 10x
\n" ); document.write( " 160= x\r
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\n" ); document.write( "\n" ); document.write( "I can solve the problem when I have to decrease the percent. What I am having trouble with is when I am asked to INCREASE the percentage. Here is the problem I need help with.
\n" ); document.write( "If 800 ml of a juice drink is 15% grape juice, how much grape juice should be added to make a drink that is 20% grape juice? I am not sure where to start. I would appreciate any help that you have to offer.
\n" ); document.write( "Thanks,
\n" ); document.write( "Horus2 \n" ); document.write( "

Algebra.Com's Answer #170753 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
If 800 ml of a juice drink is 15% grape juice, how much grape juice should be added to make a drink that is 20% grape juice?
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\n" ); document.write( "The other 85% is water = 800*0.85 = 680 ml of water.
\n" ); document.write( "Add juice to make that 680 ml of water 80% of the solution.
\n" ); document.write( "If 680 ml is 80%, then the total solution is 680/0.8 = 850 ml
\n" ); document.write( "--> add 50 ml of juice.\r
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