May 2019
Beginner
192 pages
3h 30m
English
Content preview from Pre-Algebra Essentials For Dummies
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Chapter 6
Puzzling Out Percents
IN THIS CHAPTER
Understanding what percents are
Converting percents back and forth between decimals and fractions
Solving both simple and difficult percent problems
Using the percent circle to solve three types of percent problems
Like whole numbers and decimals, percents are a way to talk about parts of a whole. The word percent literally means “for 100,” but in practice, it means closer to “out of 100.” For example, suppose a school has exactly 100 children — 50 girls and 50 boys. You can say that “50 out of 100” children are girls — or you can shorten it to simply “50 percent.” Even shorter than that, you can use the symbol %, which means percent.
Saying that 50% of the students are girls is the same as saying that 
of them are girls. Or if you prefer decimals, it’s the same thing as saying that 0.5 of all the students are girls. This example shows you that percents, like fractions and decimals, are just another way of talking about parts of the whole. ...
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