Basic College Mathematics (9th Edition)

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

Chapter 5 - Ratio and Proportion - Review Exercises: 60



Work Step by Step

We can write the given ratio as a fraction and then simplify in lowest terms. We know that there are 60 minutes in 1 hours, so we can write 3 hours as $(3\times60)=180$ minutes. $\frac{15minutes}{180minutes}$ Since both the denominator and numerator have the same unit, we can divide out the common unit. $\frac{15}{180}=\frac{15\div15}{180\div15}=\frac{1}{12}$
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