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MODELING PERCENTS
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PREVIOUS KNOWLEDGE
• Model each fraction:• ½
• ¼
• ¾
• 3/5
• 4/7
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Objectives
• To understand percent• To model a percent• To identify a percent
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Modeling a Percent• A percent is a ratio that compares a number to
100.• Percent is denoted by the symbol(%)• i.e 50 % = 50 out of 100
OR50% = 50
100A 10 x 10 grid can be used to represent hundredths.We can use a 10 x 10 grid to model percents.Shade the required number out of 100 squares.
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MODEL A PERCENTModel 18% Model 36%
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Your Turn
Model each percent:
1. 25%
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Problems
2. Model 5%
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Identify a Percent
• Identify the percent of a model that is shaded.• For example, if there are 10 squares are
shaded out of 100 squares, it means that the model shows 10%.
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Example – 1
There are 45 out of 100 squares are shaded. So the model shows 45%
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Example – 2
There are 58 out of 100 squares are shaded. So, the model shows 58%
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Practice Problems
Identify each model
1.
29%
99%
2
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Word Problems
• In a meeting, 45% of the audience are men, 35% are women and the rest are children. Model each percent.
Men
women
Children – 20%
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Let’s try by yourself
• In a CD case, 32% are pop music, and 33 % are film songs and 35% of them are videos. Model each percent
POP MUSIC
FILM SONGS
VIDEOS
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Review
• A percent is a ratio that compares a number to 100.• Percent is denoted by the symbol(%)• i.e 50 % = 50 out of 100
A 10 x 10 grid can be used to represent hundredths.
We can use a 10 x 10 grid to model percents.
Shade the required number out of 100 squares.
• To identify the percent of a model that is shaded.
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ASSESSMENT
Model each percent
1. 35%
2. 13%
3. 9%
4. 20%
5. 23%
35%
13%
9%
20%
23%
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Assessment
32%
20%
12%
8%
28%
Identify each percent modeled.
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Great Job!