Monday, March 10th - Percent Change Notes
Presentation
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Mathematics
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7th Grade
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Practice Problem
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Medium
Laura Goblirsch
Used 8+ times
FREE Resource
19 Slides • 18 Questions
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Untitled Lesson
By Laura Goblirsch
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Multiple Choice
When is the next quiz?
Tomorrow, 3/11
Wednesday, 3/12
Thursday, 3/13
Friday, 3/14
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4
Warm up
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Poll
Does the table in the warm up have a constant rate of change?
Yes
No
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Multiple Choice
How do you find k?
(constant of proportionality)
x=yk
k=yx
k=xy
y=kx
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Multiple Select
What is the percent change formula?
Select all that apply.
oldnew−old
newold−new
original amountamount of change
amount of changeoriginal amount
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Reorder
Put the steps to find the percent change in the correct order.
Identify the new and old values.
Substitute values in the formula.
Solve by subtracting first, then divide.
Change the answer into a percent. (multiply by 100)
Label it as a percent increase or percent decrease.
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Dropdown
Percent
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Write This Down!!
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Multiple Choice
Which of the following is the correct set up for the first example?
From 36 to 45.
3645−36
4545−36
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Fill in the Blanks
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Fill in the Blanks
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Fill in the Blanks
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Fill in the Blanks
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Multiple Choice
When finding the new amount of something, how do you find the amount of change?
Divide the percent (as a decimal) by the original (old) value.
Multiply the percent (as a decimal) by the original (old) value.
Multiply the percent (as a percent) by the original (old) value.
Multiply the percent (as a decimal) by the ending (new) value.
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Dropdown
When there is a percent decrease, I need to
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Dropdown
In this problem, the original value is
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Open Ended
Example 1: 48 cookies; 25% decrease.
How many cookies are there now?
Use the sentence frame: There are ___ cookies left.
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Open Ended
Example 2: A television is $499. The price is increased by 10%.
What is the new price of the tv?
Use the sentence frame: The new tv is...
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Open Ended
Example 3: There were 28 members but 50% left the meeting.
How many members are left at the meeting?
Use the sentence frame: There are ___ members left.
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Open Ended
Example 4:
The grizzly bear population in Yellowstone National Park in 1970 was about 270. Over the next 35 years, it increased by about 115%.
What was the population in 2005? You will want to round to the nearest grizzly bear.
Use the sentence frame: The grizzly bear population in 2005 was ___ bears.
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Percent Change Google Form
Now that you have finished your notes, you can get started on today's assignment. There is a google form posted on google classroom. Use your notes and box paper to complete the assignment.
Untitled Lesson
By Laura Goblirsch
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