document.write( "Question 40102: when do you cross multiply fractions and when do you just multiply the numerators and denominators \n" ); document.write( "
Algebra.Com's Answer #25531 by fractalier(6550)\"\" \"About 
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You only \"cross-multiply\" when two fractions are set equal into a proportion...
\n" ); document.write( "Thus if you have A/B = C/D, you can cross-multiply and get
\n" ); document.write( "AD = BC
\n" ); document.write( "If the fractions are on the same side of an equal sign, you merely multiply numerators and denominators...
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