document.write( "Question 999143: You have 20 fl oz of a gas/oil mixture that is 2.5% oil. How much gas should you add to lower it
\n" ); document.write( "to a 2% mix?
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Algebra.Com's Answer #616835 by Boreal(15235)\"\" \"About 
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20*0.025=0.5 fl oz oil
\n" ); document.write( "That needs to be (0.02) of the total amount, x
\n" ); document.write( "0.02 is 1/50
\n" ); document.write( "So the same amount of oil, 0.5 fl oz, is 1/50 of the total amount of mix, so the total amount of mix is 25 ml.
\n" ); document.write( "You need to add 5 ml gas.
\n" ); document.write( "0.5/25=0.02 or 2%\r
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