document.write( "Question 705939: How would you do this problem: (-3/5)(-4/21)? It may seem simple but I'm not sure of the steps.\r
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Algebra.Com's Answer #434890 by KMST(5328) $\"\"$ $\"About$

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$\"%28-3%2F5%29%28-4%2F21%29\"$
\n" ); document.write( "First, you figure out if the product will have a minus sign.
\n" ); document.write( "If both factors have the same sign, the product is positive,
\n" ); document.write( "so no minus sign is needed.
\n" ); document.write( " $\"%28-3%2F5%29%28-4%2F21%29=%283%2F5%29%284%2F21%29\"$
\n" ); document.write( "Now, when we multiply fractions,
\n" ); document.write( "we multiply the numerators (the top parts) to get the numerator of the result,
\n" ); document.write( "and we multiply the denominators (the bottom parts) to get the denominator of the result.
\n" ); document.write( " $\"%283%2F5%29%284%2F21%29=3%2A4%2F%285%2A21%29\"$
\n" ); document.write( "At this point we see if we can simplify,
\n" ); document.write( "because it is easier to simplify at this point than afterwards.
\n" ); document.write( " $\"21=3%2A7\"$ so we can write it as that
\n" ); document.write( " $\"3%2A4%2F%285%2A21%29=3%2A4%2F%285%2A3%2A7%29\"$
\n" ); document.write( "Then we can cross out the 3's and end up with $\"4%2F5%2F7=highlight%284%2F35%29\"$
\n" ); document.write( "because $\"3%2F3=1\"$ and
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