SOLUTION: A solution of 100% concentration how much should I add to 15 litre of water to make the final concentration 2% ??

Question 395602: A solution of 100% concentration how much should I add to 15 litre of water to make the final concentration 2% ??
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A solution of 100% concentration how much should I add to 15 litre of water to make the final concentration 2% ??
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Equation:
Let "x" be the amount of 100% solution you add.
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water + water = water
15 + 0*x = 0.98(15+x)
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Multiply thru by 100 to get:
1500 + 0 = 98*15+98x
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98x = 1500-1470
98x = 30
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x = 30/98
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x = 0.306 liters
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Cheers,
Stan H.
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