1. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 7.2 Solving Percent Problems with Equations

2. 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.

3. 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

4. Martin-Gay, Prealgebra, 6ed 44 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 20% of 50  10 20%50  10 percentbaseamount Percent Equation percent ∙ base  amount Solving Percent Problems

5. 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

6. 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