document.write( "Question 966715: In a a class of 42, 38 students were present on friday, what fraction of students were absent on Friday?, the correct answer written in the end of the book is 1/20, please explain. \n" ); document.write( "
Algebra.Com's Answer #590885 by Fombitz(32388)\"\" \"About 
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42 total
\n" ); document.write( "38 present on Friday
\n" ); document.write( "4 absent on Friday
\n" ); document.write( "\"4%2F42=highlight%282%2F21%29\"
\n" ); document.write( "The answer in the back of the book is incorrect.
\n" ); document.write( "No fraction of a class of 42 can have a denominator of 20 since 20 is not a factor of 42.
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