Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1 - Introduction to Algebraic Expressions - 1.3 Fraction Notation - 1.3 Exercise Set - Page 28: 97



Work Step by Step

$\frac{\frac{27ab}{15mn}}{\frac{18bc}{25np}}\longrightarrow$ Divide fractions by multiplying the inverse of the denominator. $\frac{27ab}{15mn}\times\frac{25np}{18bc}\longrightarrow$ Use prime factorization. $\frac{3\times3\times3\times a\times b}{3\times5\times m\times n}\times\frac{5\times5\times n\times p}{2\times3\times3\times b\times c}\longrightarrow$ Identify factors that cancel (marked with a line over the top). $\frac{\overline{3}\times\overline{3}\times\overline{3}\times a\times \overline{b}}{\overline{3}\times\overline{5}\times m\times \overline{n}}\times \frac{\overline{5}\times5\times \overline{n}\times p} {2\times\overline{3}\times\overline{3}\times \overline{b}\times c}\longrightarrow$ Eliminate canceled factors. $\frac{5ap}{2cm}$
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