#### Answer

$\frac{1}{100}$

#### Work Step by Step

$(\frac{2}{5}-\frac{3}{10})^{2}$
$=(\frac{4}{10}-\frac{3}{10})^{2}$
$=(\frac{1}{10})^{2}$
$=(\frac{1}{10}\times\frac{1}{10})$
$=\frac{1}{100}$

Published by
Pearson

ISBN 10:
0321955048

ISBN 13:
978-0-32195-504-3

$\frac{1}{100}$

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