document.write( "Question 149639: how do you do this?There are 30 students in a class, and three-fifths of them are girls. How many
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Algebra.Com's Answer #109772 by Alan3354(69443)\"\" \"About 
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how do you do this?There are 30 students in a class, and three-fifths of them are girls. How many
\n" ); document.write( "boys are in the class??
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\n" ); document.write( "3 fifths of 30 = 18, so there are 18 girls.
\n" ); document.write( "That leaves 12 boys.
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