1. Modeling and Understanding Percents Pages 425-428 in Textbook

2. Objectives I can use models to represent percents.
I can write percents as decimals and fraction.

3. Vocabulary Percent: Is a ratio that compares a number to 100.
The symbol for percent is: %

4. Modeling Activity
On your graph paper make a border to form a 10 x 10 grid. It should contain 100 squares
Each of the small squares represents how much?
1/100 or 1%
To model 25%, how many squares should I shade in?
25. Go ahead and shade them in.

5. Continued
The shaded portion represents 25%, the decimal 0.25, and the fraction 25/100= ¼
Everyone model 35%.
Then write it as a decimal and a fraction.
0.35, 35/100 = 7/20
Try another
80%

6. Draw Conclusion Reasoning
How would I model 100%
Shade in 100 squares
How would I model 150%?
Shade in 150 Squares
How would I model 200%?
Shade in 200 squares
How would I model .5%
Shade in half of a square

7. Understanding Percents
A percent is what?
A ratio that compares a number to 100.
Percents means
Per hundred
Out of 100
You can remember that percent means per hundred by thinking of how many cents in a dollar.

8. Writing ratios in different forms.
A bag full of 100 marbles, has 43 blue, 7 red and 50 green. You can write the ratio of blue marble to the whole in three ways: Percent: 43% Decimal: 0.43 Fraction: 43/100 Write the ratio of red marbles in the three ways? 7%, 0.07, 7/100

9. Writing a percent as a decimal!
Divide the value by 100:
57% = = 0.57
Or you can move the decimal two spots to the left.
Try a couple:
15%, 6%, 32.5%

10. Write a percent as a fraction!
Rewrite the percent using a denominator of 100, Simplify if possible.
45%
45/100 = 9/20
You try:
20%, 56%

11. We will continue with Modeling and Understanding Percents
We will continue with Modeling and Understanding Percents. Monday/Tuesday We will be covering percents, decimals, and fractions. Wednesday/Thursday We will be covering the percent of a number.