1. do warmups 2. check hw 1.how do you find a percent, based on part of a whole? 2.what percent of...

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1. Do Warmups 2. Check HW 1. How do you find a percent, based on part of a whole? 2. What percent of 52 is 39? 3. What percent of 78 is 48.75? 4. What percent of 90 is 110? Round to the nearest hundredth of a percent.

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Page 1: 1. Do Warmups 2. Check HW 1.How do you find a percent, based on part of a whole? 2.What percent of 52 is 39? 3.What percent of 78 is 48.75? 4.What percent

1. Do Warmups 2. Check HW

1. How do you find a percent, based on part of a whole?

2. What percent of 52 is 39?

3. What percent of 78 is 48.75?

4. What percent of 90 is 110? Round to the nearest hundredth of a percent.

Page 2: 1. Do Warmups 2. Check HW 1.How do you find a percent, based on part of a whole? 2.What percent of 52 is 39? 3.What percent of 78 is 48.75? 4.What percent

4.2: Percent of Change

Page 3: 1. Do Warmups 2. Check HW 1.How do you find a percent, based on part of a whole? 2.What percent of 52 is 39? 3.What percent of 78 is 48.75? 4.What percent

Percents of Increase/Decrease

• A very common way of using percents is to talk about the percent by which an amount changes.

• For example:At the beginning of the year, I had 20 students in time block 1. Now, I have 18. The number of students decreased by 2.2 is 10% of 20 (you can use percent equation to check), so there was a 10% decrease in the number of students.

Page 4: 1. Do Warmups 2. Check HW 1.How do you find a percent, based on part of a whole? 2.What percent of 52 is 39? 3.What percent of 78 is 48.75? 4.What percent

Finding the percent of change

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A. Was this an increase or a decrease?

B. What was the percent of change?How to:1. Find the amount of change.2. Find what percent the amount of change is compared to the original amount.

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