Lesson Percent of Change

Lesson - Percent of Change & Error Review

Lesson Objective

We will review how to find the percent of change and percent error

Please Watch the Following Video

Finding the percent of change

REMEMBER!

Please Watch the Following Video

Finding the percent error

REMEMBER!

Poll

Discuss & Respond!

Who will win Super Bowl 56?!

• Cincinnati Bengals

• Los Angeles Rams

Multiple Choice

Determine if Percent of Change is a percent of increase or decrease $120 to $135

• Increase

• Decrease

Multiple Choice

Determine if Percent of Change is a percent of increase or decrease

70 inches to 45 inches

• Increase

• Decrease

Multiple Choice

Find the percent of Change. 25 yards to 30 yards

$$\frac{New\ Amount\ -\ Original\ Amout}{Orginal\ Amount}\ \times\ 100$$  

• 17% decease

• 20% increase

• 17% increase

• 20% decrease

Multiple Choice

Find the percent of Change. 125 centimeters to 87.5 centimeters $$\frac{New\ Amount\ -\ Original\ Amout}{Orginal\ Amount}\ \times\ 100$$  

• 30% increase

• 43% increase

• 43% decrease

• 30% decrease

Multiple Choice

Chris estimates there are 12 students absent.  The actual amount of students absent is 15.  Find the percent error.

$$\frac{Estimate\ -\ Actual\ Amout}{Actual\ Amount}\ \times\ 100$$  

• 20%

• 30%

• 15%

• 25%

Multiple Choice

Mr. SMith goes to the hardware store and estimates that he will spend $135.  He actually spends $90.  Find the percent error.

$$\frac{Estimate\ -\ Actual\ Amout}{Actual\ Amount}\ \times\ 100$$  

• 60%

• 33%

• 25%

• 50%

Great Job!

Now you will try this on your own. Go to Google Classroom and click on Self Check - Percent of Change and Percent Error Review