Understanding Percent

Understanding Percent

What is a percent?

What is a Percent?

A percent is a special kind of ratio in which the first term is compared to 100.

What percent of people prefer Bright White Toothpaste?

The fraction of people that prefer Bright White Toothpaste is:   $\frac{7}{10}$  

One Way: Use a grid to model the percent.

 $\frac{7}{10}$  =  $\frac{70}{100}$  = 70%

Another Way: Use number lines to model the percent.

 $\frac{7}{10}$  =  $\frac{70}{100}$  =  70%

Another Way: Use proportion to find the percent.

70% of people prefer Bright White Toothpaste.

Multiple Choice

What percent of this figure is shaded?

• 7%

• 70%

• 700%

• 0.7%

Multiple Choice

Write the percent of this figure that is shaded.

• 3%

• 30%

• 60%

• 6%

Fill in the Blanks

Fill in the Blanks

Multiple Choice

Which of the following figures is 60% shaded?

Poll

How do you feel about Understanding Percents?

• Great!

• So-So

• Confused