91Ó°ÊÓ

Solve each of the following problems by first restating it as one of the three basic percent problems of Section 7.2 . In each case, be sure to show the equation. In a shipment of airplane parts, \(3 \%\) are known to be defective. If 15 parts are found to be defective, how many parts are in the shipment?

Solve each of these problems using the method developed in this section. According to the Centers for Disease Control and Prevention (CDC), more than \(60 \%\) of U.S. adults are overweight, and about \(15 \%\) of children and adolescents ages 6 to 19 are overweight. Your friend decides to go on a diet and goes from 155 pounds to 130 pounds over a 4 month period. What was her percentage weight loss? Round your answer to the nearest percent.

Change each decimal to a percent. $$0.23$$

Change each decimal to a percent. $$0.34$$

Solve each of the following problems. 90 is \(80 \%\) of what number?

Set up the following problems the same way you set up Problems 1-22. Then use a calculator to do the calculations. A teacher making \(\$ 43,752\) per year gets a \(6.5 \%\) raise. What is the new salary?

Change each decimal to a percent. $$0.92$$

Change each decimal to a percent. $$0.87$$

Change to percent. $$\frac{400}{2,400}$$

Change to percent. $$\frac{200}{2,400}$$