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MODELING PERCENTS


PREVIOUS KNOWLEDGE

• Model each fraction:• ½

• ¼

• ¾

• 3/5

• 4/7


Objectives

• To understand percent• To model a percent• To identify a percent


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.


MODEL A PERCENTModel 18% Model 36%


Your Turn

Model each percent:

1. 25%


Problems

2. Model 5%


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%.


Example – 1

There are 45 out of 100 squares are shaded. So the model shows 45%


Example – 2

There are 58 out of 100 squares are shaded. So, the model shows 58%


Practice Problems

Identify each model

1.

29%

99%

2


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%


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


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.


ASSESSMENT

Model each percent

1. 35%

2. 13%

3. 9%

4. 20%

5. 23%

35%

13%

9%

20%

23%


Assessment

32%

20%

12%

8%

28%

Identify each percent modeled.


Great Job!

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