Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 7.2 Solving Percent Problems...
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Transcript of Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 7.2 Solving Percent Problems...
![Page 1: Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 7.2 Solving Percent Problems with Equations.](https://reader036.fdocuments.in/reader036/viewer/2022082713/5697bffa1a28abf838cc0412/html5/thumbnails/1.jpg)
Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall.
7.2
Solving Percent Problems with
Equations
![Page 2: Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 7.2 Solving Percent Problems with Equations.](https://reader036.fdocuments.in/reader036/viewer/2022082713/5697bffa1a28abf838cc0412/html5/thumbnails/2.jpg)
Martin-Gay, Prealgebra, 6ed 22
Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall.
Key Words
of means multiplication (∙)
is means equals ()
what (or some equivalent) means the unknown number
Let x stand for the unknown number.
![Page 3: Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 7.2 Solving Percent Problems with Equations.](https://reader036.fdocuments.in/reader036/viewer/2022082713/5697bffa1a28abf838cc0412/html5/thumbnails/3.jpg)
Martin-Gay, Prealgebra, 6ed 33
Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall.
Remember that an equation is simply a mathematical statement that contains an equal sign ().
6 18x
equal sign
Helpful Hint
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Martin-Gay, Prealgebra, 6ed 44
Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall.
20% of 50 10
20% • 50 10percent base amount
Percent Equationpercent ∙ base amount
Solving Percent Problems
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Martin-Gay, Prealgebra, 6ed 55
Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall.
When solving a percent equation, write the percent as a decimal or fraction.
If your unknown in the percent equation is a percent, don’t forget to convert your answer to a percent.
Helpful Hint
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Martin-Gay, Prealgebra, 6ed 66
Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall.
Use the following to see if your answers are reasonable.
a percent greater than 100%
a percent less than 100%
a number larger than the original number
a number less than the original number
100% of a number the number
Helpful Hint