document.write( "Question 1006966: You have won 3 out of 17 games how many games will you have to win in a row to improve your winning percentage to 90%? The answer is 123 but I don't know how to work the problem out please help . \n" ); document.write( "

Algebra.Com's Answer #622991 by fractalier(6550) $\"\"$ $\"About$

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Let the number of games to be played be x. Then we set it up like this:
\n" ); document.write( " $\"%283+%2B+x%29+%2F+%2817+%2B+x%29+=+.9\"$
\n" ); document.write( "We cross-multiply and get
\n" ); document.write( "3 + x = 15.3 + .9x
\n" ); document.write( ".1x = 12.3
\n" ); document.write( "and
\n" ); document.write( "x = 123 games \n" ); document.write( "

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