Percent of Change
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Transcript of Percent of Change
![Page 1: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/1.jpg)
Percent of Change
![Page 2: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/2.jpg)
• A special ratio is PERCENT.
• The word PERCENT means:
“out of”
00
1
![Page 3: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/3.jpg)
35% =
99% =
12.5% =
35100
99100
12.5100
So you can turn any percent into a ratio:
![Page 4: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/4.jpg)
What if we DON’T KNOW a percent yet… how would we write the ratio??
100??? % =
لجبرا USE ALGEBRA !
X
![Page 5: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/5.jpg)
EXAMPLE: 32 is what percent of 56??
Set up your ratios…32
56= _x_
100 …and solve it !!!
Sorry, Mr. AYou have to write
it yourself!!
![Page 6: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/6.jpg)
Percent CHANGE
Sometimes we are asked to see how much something changes.
![Page 7: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/7.jpg)
To find the Percent Change, follow these steps!
![Page 8: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/8.jpg)
Original Price : $18
New Price : $10
What is the Percent Changein the price?
Increase or Decrease ??DECREASE
By how much?$18 – $10 = $8
Make a ratio comparingthe changechange over the originaloriginal
$8$18
![Page 9: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/9.jpg)
$8$18
Set the change ratioequal to the percent ratio
= X100
SOLVE IT !!!!
![Page 10: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/10.jpg)
To find the percent of something, just set up a proportion!
EXAMPLE: Sales Tax in Florida is 7%. How much tax will you pay for a $12,000 car?
7100=
X
12,000
![Page 11: Percent of Change](https://reader036.fdocuments.us/reader036/viewer/2022082623/546579a0b4af9f680b8b4ea1/html5/thumbnails/11.jpg)
• Remember a TAX is something you add to the original price.
• A DISCOUNT is something you subtract from the original price.