Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 1 - Section 1.2 - Fractions in Algebra - Exercise Set: 78

Answer

$\frac{8}{15}$

Work Step by Step

$\frac{1}{3} + \frac{1}{5}$ the least common denominator for the denominators 3 and 5 is 15. To obtain denominators of 15, multiply the numerator and denominator of the first fraction by 5 and the second fraction by 3 $\frac{1}{3} + \frac{1}{5}$ = $\frac{1*5}{3*5} + \frac{1*3}{5*3}$ $\frac{5}{15} + \frac{3}{15}$ Add the numerators and put this sum over the least common denominator. $\frac{5+3}{15}$ = $\frac{8}{15}$
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