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: 87

Answer

$\frac{41}{80}$

Work Step by Step

$\frac{7}{10} - \frac{3}{16}$ The least common denominator for the denominators 10 and 16 is 80. To obtain denominators of 80, multiply the numerator and denominator of the first fraction by 8 and second fraction by 5 $\frac{7}{10} - \frac{3}{16}$ = $\frac{7*8}{10*8} - \frac{3*5}{16*5}$ $\frac{56}{80} - \frac{15}{80}$ Calculate difference of the numerators and put this difference over the least common denominator. $\frac{56-15}{80}$ = $\frac{41}{80}$
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