1. Solving Percent Problems with Equations Section 7.2

2. Key Words of of means multiplication multiplication ()()()() is is means equals equals ()()()() what what (or some equivalent) means the unknown number Let xstand for the unknown number. 2 Martin-Gay, Prealgebra, 5ed

3. Helpful Hint Remember that an equation is simply a mathematical statement that contains an equal sign (). Remember that an equation is simply a mathematical statement that contains an equal sign (  ). 6  18x equal sign 3 Martin-Gay, Prealgebra, 5ed

4. 20% of 50  10 20%50  10 percentbaseamount Percent Equation percent base  amount Solving Percent Problems 4 Martin-Gay, Prealgebra, 5ed

5. Helpful Hint When solving a percent equation, write the percent as a decimal or fraction. If your unknown in the percent equation is percent, don’t forget to convert your answer to a percent. 5 Martin-Gay, Prealgebra, 5ed

6. Helpful Hint 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 6