Basic College Mathematics (9th Edition)

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

Chapter 2 - Multiplying and Dividing Fractions - 2.6 Applications of Multiplication - 2.6 Exercises: 22

Answer

(answers vary) The main reason in not getting $1$ as an answer is that you made a mistake in the addition of the fractions. Some possible mistakes are: (1) You made a mistake in converting some fractions to a fraction whose denominator is 20 (the LCD). (2) After making the fractions similar using their LCD of 20, you made a mistake in adding the numerators. (3) You made a mistake of adding the numerators together and adding the denominators together to get $\frac{7}{29}$.

Work Step by Step

In Exercise 21, if you added the fractions for the groups and did not get $1$ as answer, then you must have made a mistake in the addition. Some possible reasons are: (1) You made a mistake in converting some fractions to a fraction whose denominator is 20 (the LCD); (2) After making the fractions similar using their LCD of 20, you made a mistake in adding the numerators; or (3) You made a mistake of adding the numerators together and adding the denominators together to get $\frac{7}{29}$.
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