Simplify

4/9 . {3/7 - 1/7}

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- Apr 24th 2006, 12:58 AMbounineSimplify help needed
Simplify

4/9 . {3/7 - 1/7} - Apr 24th 2006, 01:24 AMTD!
What's the problem?

$\displaystyle

\frac{4}{9}\left( {\frac{3}{7} - \frac{1}{7}} \right) = \frac{4}{9}\left( {\frac{2}{7}} \right) = \frac{{2 \cdot 4}}{{9 \cdot 7}} = \frac{8}{{63}}

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