Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 5 - Number Theory and the Real Number System - 5.3 The Rational Numbers - Exercise Set 5.3: 39

Answer

$0.4=\frac{2}{5}$

Work Step by Step

Multiply $\frac{10}{10}$, which is equal to 1, by the decimal to find: $0.4(\frac{10}{10}) \\= \frac{4}{10} \\=\frac{2}{5}$ Notice that we reduced the fraction.
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