Basic College Mathematics (10th Edition)

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Chapter 6 - Percent - 6.4 Using Proportions to Solve Percent Problems - 6.4 Exercises - Page 417: 21

Answer

$\frac{25}{100}=\frac{80}{n}$ (We are asked not to solve for $n$, so we stop here.)

Work Step by Step

We know that 25% of the emails is 80. Thus, to find out the total number of emails, we set up a proportion: $\frac{25}{100}=\frac{80}{n}$ Where $n$ is the total number of emails. (We are asked not to solve for $n$, so we stop here.)
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