Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 2 - Multiplying and Dividing Fractions - 2.7 Dividing Fractions - 2.7 Exercises - Page 164: 9

Answer

$\frac{5}{8}$

Work Step by Step

Remember, that the product of a number $a$ and its reciprocal is 1. Therefore, the reciprocal of $a$ must be $\frac{1}{a}$ (which is just $a$ flipped), so that $a\times\frac{1}{a}=1$. Therefore, the reciprocal of $\frac{8}{5}$ is $\frac{1}{\frac{8}{5}}=1\times\frac{5}{8}=\frac{5}{8}$. $\frac{8}{5}\times\frac{5}{8}=1$
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