document.write( "Question 466368: there are 9 books 55% of 9 books are out,how many are left? solve this problem using a proportion show all steps.and explain \n" ); document.write( "
Algebra.Com's Answer #319736 by nerdybill(7384)\"\" \"About 
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there are 9 books 55% of 9 books are out,how many are left? solve this problem using a proportion show all steps.and explain
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\n" ); document.write( "since 55% are out
\n" ); document.write( "100-55 = 45% are left
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\n" ); document.write( "Let x = books left
\n" ); document.write( "then
\n" ); document.write( "x/9 = 45/100 (this is your proportion)
\n" ); document.write( "cross multiplying:
\n" ); document.write( "100x = 9*45
\n" ); document.write( "100x = 405
\n" ); document.write( "x = 4.05
\n" ); document.write( "since you can't have fractional book, you have to round down:
\n" ); document.write( "there are 4 books left
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